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Calpine Interview Questions

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Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

Calpine Salaries by Position

Houston Office
717 Texas Ave
Ste 1000
Houston, TX 77002, USA

Calpine Corporation is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Its fleet of 76 power plants in operation and one under construction represents nearly 26,000 megawatts of generation capacity. Through wholesale power operations and its retail businesses, Calpine serves customers in 22 states, Canada and Mexico. Its clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner.
The company was established on the premise that a strong commitment to the environment is inextricably linked to excellence in power generation and corporate responsibility. Since its founding in 1984, Calpine has led the power industry in its unwavering commitment to environmental stewardship. In addition, its renewable geothermal plants use steam generated deep below the earth's surface to produce clean, renewable electricity.
Job Summary
The Human Resources Data Analyst for Human Resources plays a key role in developing business analytics that help drive decisions. This role is responsible for developing, maintaining, and improving a framework for measuring, tracking, and analyzing data, metrics, and KPIs while identifying trends and issues. Examples of duties include performing quantitative and qualitative analysis, problem solving, model development, data analysis and manipulation of large datasets, synthesizing results, and highlighting business implications. Additionally, this role is responsible for creating and distributing Weekly Headcount Reports, Monthly Organizational Charts and assisting with monthly financial analysis.
Job Responsibilities
Seasoned professional with advanced applied experience.
Applies advanced skills contributing to knowledge areas within function, but not yet an expert in all.
Makes recommendations on moderately complex issues regarding project components and tasks.
May make recommendations on new processes, tools and services; supports and contributes to development of new products, services or techniques.
Works on problems of diverse scope ranging from moderate to complex.
Uses independent judgment requiring in-depth analysis of variable factors.
Collaborates with senior professionals in selection of methods, techniques, and analytical approach.
Little instruction on day-to-day work, general instructions on new assignments.
Serves as project/technical lead on small to medium sized projects; may coordinate work of professionals, technicians and others outside of own department.
Resource integrator – builds professional networks and identifies and connects resources to achieve goals. Regularly contributes actionable ideas in brainstorming and planning sessions.
Job Requirements
Bachelor’s Degree or equivalent in human resources, business administration, finance, accounting or related field, MBA is a plus; prior HR, Finance, or accounting experience preferred.
Minimum of 5 years’ experience with at least 3 years demonstrated experience performing data analyses, creating and managing various tools to support analytics, and creating management reports and dashboards, or the equivalent combination of education and related experience.
Demonstrated high level competency in various software packages including, but not limited to Microsoft Office, specifically Excel, PowerPoint, SharePoint, and Cognos; knowledge of HRIS, MS Access, Power BI, Visio and reporting tools.
VBA is a plus.
Must demonstrate attention to detail, data integrity and accuracy be results oriented and demonstrate the ability to multitask; must have experience developing and managing budgets including variances.
Additional Calpine Information
Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities.
Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis.

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Calpine Corporation is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Its fleet of 76 power plants in operation and one under construction represents nearly 26,000 megawatts of generation capacity. Through wholesale power operations and its retail businesses, Calpine serves customers in 22 states, Canada and Mexico. Its clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner. The company was established on the premise that a strong commitment to the environment is inextricably linked to excellence in power generation and corporate responsibility. Since its founding in 1984, Calpine has led the power industry in its unwavering commitment to environmental stewardship. In addition, its renewable geothermal plants use steam generated deep below the earth's surface to produce clean, renewable electricity. Job Summary (includes but is not limited to the following, other duties may be assigned) The Human Resources Data Analyst for Human Resources plays a key role in developing business analytics that help drive decisions. This role is responsible for developing, maintaining, and improving a framework for measuring, tracking, and analyzing data, metrics, and KPIs while identifying trends and issues. Examples of duties include performing quantitative and qualitative analysis, problem solving, model development, data analysis and manipulation of large datasets, synthesizing results, and highlighting business implications. Additionally, this role is responsible for creating and distributing Weekly Headcount Reports, Monthly Organizational Charts and assisting with monthly financial analysis. Job Responsibilities <ul><li>Comprehensive knowledge. </li><li>Seasoned professional with advanced applied experience. </li><li>Applies advanced skills contributing to knowledge areas within function, but not yet an expert in all. </li><li>Makes recommendations on moderately complex issues regarding project components and tasks. </li><li>May make recommendations on new processes, tools and services; supports and contributes to development of new products, services or techniques. </li><li>Works on problems of diverse scope ranging from moderate to complex. </li><li>Uses independent judgment requiring in-depth analysis of variable factors. </li><li>Collaborates with senior professionals in selection of methods, techniques, and analytical approach. </li><li>Little instruction on day-to-day work, general instructions on new assignments. </li><li>Serves as project/technical lead on small to medium sized projects; may coordinate work of professionals, technicians and others outside of own department. </li><li>Resource integrator builds professional networks and identifies and connects resources to achieve goals. Regularly contributes actionable ideas in brainstorming and planning sessions. </li></ul>Job Requirements <ul><li>Bachelors Degree or equivalent in human resources, business administration, finance, accounting or related field, MBA is a plus; prior HR, Finance, or accounting experience preferred. </li><li>Minimum of 5 years experience with at least 3 years demonstrated experience performing data analyses, creating and managing various tools to support analytics, and creating management reports and dashboards, or the equivalent combination of education and related experience. </li><li>Demonstrated high level competency in various software packages including, but not limited to Microsoft Office, specifically Excel, PowerPoint, SharePoint, and Cognos; knowledge of HRIS, MS Access, Power BI, Visio and reporting tools. </li><li>VBA is a plus. </li><li>Must demonstrate attention to detail, data integrity and accuracy be results oriented and demonstrate the ability to multitask; must have experience developing and managing budgets including variances. </li></ul>Additional Calpine Information<ul><li>Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities. </li><li>Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis. </li></ul> Please view Equal Employment Opportunity Posters provided by OFCCP here Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities The contractor will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor's legal duty to furnish information. 41 CFR 60-1.35(c)

Description Calpine Corporation is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Its fleet of 76 power plants in operation and one under construction represents nearly 26,000 megawatts of generation capacity. Through wholesale power operations and its retail businesses, Calpine serves customers in 22 states, Canada and Mexico. Its clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner. The company was established on the premise that a strong commitment to the environment is inextricably linked to excellence in power generation and corporate responsibility. Since its founding in 1984, Calpine has led the power industry in its unwavering commitment to environmental stewardship. In addition, its renewable geothermal plants use steam generated deep below the earth's surface to produce clean, renewable electricity. Job Summary (includes but is not limited to the following, other duties may be assigned) The person in this role will be responsible for performing fundamental analysis, research, and transaction analysis for natural gas and how it impacts Calpines electric generation fleet. Job Responsibilities + Identifies value proposition and inherent risks in natural gas transactions and proposes appropriate valuation methodology. + Performs analysis to price structured natural gas transactions in collaboration with marketing/origination/business development as part of the deal approval process. Support the continued development of + Calpines modeling infrastructure including asset and contract models as well as repositories of fundamental market data + Periodic corporate business plan projections and commercial transaction targets + Commercial views supporting business strategy, hedging decisions, and development/acquisition opportunities. + Present valuation results to members of the senior management team. + Works within broad guidelines; applies advanced technical knowledge of multiple functions to solve complex problems which may have a long term impact for the company. Job Requirements + Bachelors Degree in economics, mathematics, business, engineering, or other quantitative discipline with at least seven years of experience in energy sector is required. Knowledge and experience should cover a significant subset of the following: + Knowledge of U.S. natural gas market, especially related to natural gas basis and regional supply and demand fundamentals. + Familiarity with research tools such as ABB Ability Velocity Suite, Bentek, Genscape, and pipe flow data sources. + Strong understanding of pipeline operations and tariffs and the ability understand and value contracts relating to natural gas transport and storage. + Strong verbal and written communication skills. + Highly proficient with the Microsoft Office Suite (especially Excel and Power Point) + Should be able to work autonomously and accept responsibility; able to excel under the pressure of multiple deadlines. + The ability to combine knowledge of fundamental, operations, and trading to make recommendations to the trade desk. + Some knowledge of power plant operations would be desirable + Team player who is used to diving into issues, brainstorming solutions, and learning new methods and tools to address; results oriented. Additional Calpine Information + Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities. + Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis. Please view Equal Employment Opportunity Posters provided by OFCCP here (http://www.dol.gov/ofccp/regs/compliance/posters/ofccpost.htm) Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities The contractor will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractors legal duty to furnish information. 41 CFR 60-1.35(c)

Description Calpine Corporation is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Its fleet of 76 power plants in operation and one under construction represents nearly 26,000 megawatts of generation capacity. Through wholesale power operations and its retail businesses, Calpine serves customers in 22 states, Canada and Mexico. Its clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner. The company was established on the premise that a strong commitment to the environment is inextricably linked to excellence in power generation and corporate responsibility. Since its founding in 1984, Calpine has led the power industry in its unwavering commitment to environmental stewardship. In addition, its renewable geothermal plants use steam generated deep below the earth's surface to produce clean, renewable electricity. Job Summary: (includes but is not limited to the following, other duties may be assigned) Provides engineering and technical support for new projects and build outs. Works to help (i) identify and further develop new and existing technologies, (ii) provide applications of these technologies, and (iii) help determine advisability of moving forward with projects utilizing such technologies. Analyzes technical aspects of projects and provides costs and budgeting to be applied to planning and cost analytics for projects. Ensures (i) spending within budgets, and (ii) schedules and performance standards are set, maintained and achieved. Develops SOW technical scopes for third party contract resources supporting development cost build and analytics. Maintains the efficiency of important aspects of the project management process such as planning, scheduling, coordination, and budget, and risk assessment. Defines and develops project management best practices, processes, and policy to ensure alignment with corporate strategy and goals. Partners with multi-departmental leadership and other stakeholders to locate opportunities and develop and prioritize projects according to relevant measurement criteria. Collaborates with Power Ops business personnel to continuously improve processes; initiate and implements new methodologies, process and procedures that support company long, mid and short term goals; and prepares, analyzes and reports project status to the senior management. Works closely with Dir Project Management & Development. Job Responsibilities + In-depth or broad, extensive knowledge. + Highly skilled professional with wide-ranging, advanced technical experience to resolve complex issues. + Competent to work at very high level in multiple knowledge areas or functions as an advanced contributor. + Makes decisions on complex issues regarding project components and advanced tasks. + Leads the research for innovations from external sources, and identifies opportunities to develop new processes, tools, services and techniques within the function. + Works on complex issues and projects. + Uses independent judgment requiring in-depth evaluation of variable factors. Independently selects methods, techniques, analytical approach and evaluation criteria. + Determines methods and procedures for new assignments. + Serves as project/technical lead on medium to large projects; regularly coordinates work of professionals, technicians and others outside of own department. + Trains and mentors employees on technical skills. + Collaborate and solve problems works with others to resolve significant issues, clarify or interpret complex information, provide initial screening/negotiations. Job Requirements + Bachelors Degree or equivalent, prefer Masters Degree. + Previous project management experience. + Expert in the utilization of advanced design and analysis tools + Typically requires minimum of 8 to 10+ years in area of specialization. Additional Calpine Information: + Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities. + Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis. Please view Equal Employment Opportunity Posters provided by OFCCP here (http://www.dol.gov/ofccp/regs/compliance/posters/ofccpost.htm) Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities The contractor will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractors legal duty to furnish information. 41 CFR 60-1.35(c)

Description Calpine Corporation is America's largest generator of electricity from natural gas and geothermal resources with operations in competitive power markets. Its fleet of 76 power plants in operation and one under construction represents nearly 26,000 megawatts of generation capacity. Through wholesale power operations and its retail businesses, Calpine serves customers in 22 states, Canada and Mexico. Its clean, efficient, modern and flexible fleet uses advanced technologies to generate power in a low-carbon and environmentally responsible manner. The company was established on the premise that a strong commitment to the environment is inextricably linked to excellence in power generation and corporate responsibility. Since its founding in 1984, Calpine has led the power industry in its unwavering commitment to environmental stewardship. In addition, its renewable geothermal plants use steam generated deep below the earth's surface to produce clean, renewable electricity. Job Summary (includes but is not limited to the following, other duties may be assigned) Independently manages an assigned counter party portfolio by interfacing with all levels of sales and management, to ensure the protection of the companys mark to market exposure (MTM) and accounts receivable assets through the effective use of credit risk analytics and systems. Provides support to the companys sales efforts by performing timely credit risk analysis on potential and existing counter parties. At all times exercises discretion and independent judgment in assigned areas of responsibility. Key Activities + Perform credit risk analysis + Develop risk mitigating products Job Responsibilities Credit Risk Analysis 65% + Performs detailed credit risk analysis, including analysis of financial data and ratios, to qualify new and existing counter parties that meet established timelines and support ongoing sales negotiations. + Utilizes outside vendors, (Standard & Poors, Moodys, Dun & Bradstreet, etc.) to thoroughly research and obtain salient industry and counter party data for credit risk evaluation. + Perform annual reviews of financial and credit data for assigned account portfolio. Calculates and assigns credit risk ratings based upon the output of proprietary scoring models. + Initiates modifications of credit limits to existing customers to support increased business opportunities or to protect the company from undo losses. Reporting & Special Projects 25% + Generates an array of accurate monthly, quarterly and annual management reports. + Establishes and maintains counter party data in Allegro system. + Supports the Director, Credit Risk as required by performing special projects, ad hoc reporting, routine requests, etc. Collections 10% + Authorized to work autonomously in day-to-day decision making to effectively collect payments from customers in accordance with contractual terms. + Empowered to negotiate terms of sale and payment plans as necessary. + Interfaces with all levels of sales, senior management and other internal departments to expedite the resolution of disputes and thus ensure the protection of the companys settlement risk through the effective use of systems and proven collection practices. + Integral in the ongoing reconciliation of customer accounts. + Develops and maintains effective working relationships with internal and external customers to maximize cooperation and efficiency. Job Requirements + Bachelors Degree in finance, accounting or equivalent experience + Minimum of three (3) years in commercial credit + Demonstrated organization, analytical and problem-solving skills are required. + Highly skilled in complex financial analysis as it relates to evaluating creditworthiness. + Is able to identify and prioritize various tasks to efficiently produce results. + Strong verbal, written and interpersonal communication skills are essential. + Energy industry or banking experience is preferred. + Experienced with receivable management systems and is proficient in Microsoft Excel and Word. Salary Information Position is eligible for annual bonus. Salary range - $56,358 to $83,129 Additional Calpine Information + Equal Opportunity Employer of Minorities, Females, Protected Veterans, and Individuals with Disabilities. + Calpine is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment and need special assistance or an accommodation to use our website or to apply for a position, please send an e-mail with your request to hrrecruitment@calpine.com. Determination on requests for reasonable accommodation are made on case-by-case basis. Please view Equal Employment Opportunity Posters provided by OFCCP here (http://www.dol.gov/ofccp/regs/compliance/posters/ofccpost.htm) Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities The contractor will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractors legal duty to furnish information. 41 CFR 60-1.35(c)

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