What is the Z-test for Means in Statistics? Easy Explanation for Data Science Interviews

The z-test is one of the most basic, and commonly used hypothesis tests. There are many data science interview questions on z-tests, so in this video we’ll dive into when to use it, and how to conduct both one-sample and two-sample z-tests for means.
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Contents of this video:
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00:00 Introduction
01:06 When to use the z-test?
01:27 Assumptions of z-tests
02:58 Z-test for One Sample Mean
06:35 Obtain the confidence interval for population mean
08:11 Comparing the means of two populations

[@AllieZhao]

The best part is you add coding with the theory and explained quite well!

[@emma_ding]

Thanks, Allie! So glad you found it helpful! Thanks for watching. 💛

[@vinnuvinay7489]

@@emma_ding Hi Emma, Can you also share your notes

[@emma_ding]

Many of you have asked me to share my presentation notes, and now… I have them for you! Download all the PDFs of my Notion pages at www.emmading.com/get-all-my-free-resources. Enjoy!

[@shirleyfdfd]

The presentation is super helpful and clear! Thanks Emma! Could you please share the notes?

[@emma_ding]

Of course! You can download all the PDFs of my Notion pages at www.emmading.com/get-all-my-free-resources. Enjoy!

[@abhilaks]

Thanks for the video Emma, it's really handy! Just a suggestion - Might be useful to also share an example of a one-tailed test (for example when we want to test if the population mean is greater than or lesser than a target value).

[@emma_ding]

Thank you for your thoughtful feedback, Abhinav! I appreciate you taking the time to share that with me. I will take it into consideration for future videos. 😊

[@Levy957]

i love this woman

[@teddy911]

我来组成一楼！