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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?

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 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

Donatech Corporation Salaries by Position

Support a Fortune 500 Aero-Defense Company as an Embedded Software Engineer. The successful candidate will have experience performing requirements-based software verification of embedded software. Skills/Experience Required:• Develop, debug, and execute automated and manual requirements-based software verification testing. • Use version control and issue tracking tools. • Integrating and testing software with various real-time operating systems such as Linux/Unix derivatives. • Good programming skills (C++, Python, BASH).• Experience developing, analyzing, and/or reviewing requirements for safety critical real-time embedded software. • Experience with Computer Networks (switches, VLAN, protocols). • Experience building and maintaining software and hardware integration testbeds (cabling, power supply) • Testing and troubleshooting Communication protocol software (CAN, Serial, Ethernet).Bachelor's degree in STEM field Skills Preferred:• Traceability across software requirements, design, and verification artifacts.• Experience developing tests using NI Software (TestStand, VeriStand, and/or LabView). • Experience working with software architecture and design information captured in models (using tools such as Magic Draw, Enterprise Architect, or similar model-based engineering tool). • Familiarity with combat vehicle functionality and capability. • Experience using Atlassian (Bitbucket, Jira, Bamboo) tools.

Donatech Corporation Interview Questions

Donatech Corporation Interview Guides

Donatech Corporation Interview Questions

Donatech Corporation Salaries by Position

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