FAQ: Hypothesis Testing - 2 Sample T-Test


This community-built FAQ covers the “2 Sample T-Test” exercise from the lesson “Hypothesis Testing”.

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This exercise can be found in the following Codecademy content:

Data Science

FAQs on the exercise 2 Sample T-Test

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Hi. Have a probem with the exercise. If week 1 mean = 25, and std = 4, then 68% of velues should be between 21 and 29. Also, If week 2 mean = 29, and std = 5, then 68% of velues should be between 24 and 34. Looks like the region 24 - 29 may content elements from both arrays. Why then p-value is so small (0.00067)? In this case Null hipothesis should be true. But result is opposite. Or I didnt get something :frowning: