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Twinkl educational publishing Interview Questions

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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?

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

Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

Twinkl educational publishing Salaries by Position

HR Data AnalystLocation: Remote / Hybrid - 1 day a month in the officeContract: Permanent At Twinkl, we are dedicated to supporting educators worldwide by providing high-quality, innovative educational resources. With a mission to inspire and empower teaching and learning, we strive to create a positive impact in classrooms around the globe. As a People Analyst, you will be responsible for collecting, analysing and interpreting HR data to provide valuable insights and support data-driven decision-making within the organisation. This position requires a strong background in HR or a related field with a focus on data analysis and insights generation. While prior experience specifically as a People Analyst is preferred, individuals with extensive experience in the people space or a keen interest are encouraged. Key Responsibilities:<ul><li>Collect, clean, and organise HR data from various sources, including HRIS, performance management systems, employee surveys, and other relevant platforms.</li><li>Analyse HR data to identify trends, patterns, and correlations, and translate findings into actionable insights for HR and business leaders.</li><li>Develop and maintain dashboards, reports, and visualisations to effectively communicate HR metrics and KPIs to stakeholders.</li><li>Conduct ad-hoc analyses to address specific business questions or challenges related to workforce planning, employee engagement, diversity and inclusion, talent management, and other HR areas.</li><li>Participate in the design and implementation of data-driven HR initiatives, such as predictive analytics models, workforce segmentation, and retention strategies.</li><li>Ensure data accuracy, integrity, and compliance with relevant privacy regulations and internal policies.</li><li>Serve as a subject matter expert on HR analytics, providing guidance and training to HR colleagues and other team members as needed.</li><li>Support the implementation of the HRIS and oversee regular system updates and enhancements to maintain optimal performance.</li><li>Monitor the system performance and resolve technical issues promptly, ensuring data integrity and compliance by managing data audits and cleanup processes.</li><li>Working closely with the Head of HR on the Total Rewards element of the organisation:</li><li>Conduct market analysis and benchmarking to ensure competitive positioning.</li><li>develop salary structures, incentive plans and variable compensation frameworks for international regions using the UK as a blueprint.</li><li>Support the development and administration of the performance evaluation process</li><li>Integrate compensation and rewards with performance management to align employee performance with the organisational goals.</li><li>Perform cost analysis to measure the financial impact of programmes and propose adjustments as necessary.</li><li>Report on compensation metrics and financial performance to leadership.</li></ul> We're interested in anyone who meets one, or a combination of the following: <ul><li>Minimum of 5+ years experience in HR, data analysis, or a related field, with a strong track record of using data to drive business decisions.</li><li>Proficiency in data manipulation and analysis using tools such as Microsoft Excel, SQL, R, Python, or similar software.</li><li>Experience with HRIS platforms and data visualisation tools is highly desirable.</li><li>Strong analytical and problem-solving skills, with the ability to think strategically and translate data into actionable insights.</li><li>Excellent communication skills, with the ability to effectively present complex information to diverse audiences and influence decision-making at all levels of the organisation.</li><li>Detail-oriented and organised, with a commitment to data accuracy and quality.</li><li>Ability to work independently as well as collaboratively in a fast-paced and dynamic environment.</li><li>Bachelor's degree in Human Resources, Statistics, Data Science or a related field.</li></ul> If you require a reasonable adjustment to the application/selection process to enable you to demonstrate your ability to perform the job requirements please include this at the foot of your covering letter. This will help us to understand any modifications we may need to make to support you throughout our selection process. Benefits:In return for everything you can bring, we can offer you an exciting role in a fast-growing and dynamic business, with plenty of career opportunities.<ul><li>A friendly, welcoming and supportive culture. We believe work should be fun and always put people before the process</li><li>Diversity, inclusion and belonging - our Employee Network Program includes working groups for LGBTQ+, People of Colour, Disabilities (visible and invisible), Women in Tech and Working Parents.</li><li>From day 1 - Westfield Health, 33 annual leave days per year (pro-rata) inclusive bank holidays, a "Me" day each year, a charity day each year, flexible working policy with opportunities to work from home and Twinkl subscriptions.</li><li>Quarterly company awards programme</li><li>Seasonal events</li><li>Referral scheme</li><li>Cervical and Prostate screening</li><li>Company sick pay after 3 months of service</li><li>After probation - cycle-to-work scheme</li><li>Long-term service reward - Life insurance, enhanced pension contribution, enhanced maternity pay, enhanced adoption pay and enhanced paternity pay, long service award, long service annual leave</li></ul>

Twinkl educational publishing Interview Questions

Twinkl educational publishing Interview Guides

Twinkl educational publishing Interview Questions

Twinkl educational publishing Salaries by Position

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