Hypothesis Z-test Explained: One-tailed, 𝝈 known -Does This Fitness App's Claim Hold Up? скачать в хорошем качестве

Hypothesis Z-test Explained: One-tailed, 𝝈 known -Does This Fitness App's Claim Hold Up?

An introduction to hypothesis testing by examining a claim made by a fitness app regarding the average daily exercise time of its users. Explore how to formulate null and alternative hypotheses, conduct a Z-test, and interpret critical values and p-values. Understand how variability influences statistical conclusions. One-Sample t-Test for μ:    • One-Sample t-Test for μ: Hypothesis, P-val...   00:00 - Introduction to Hypothesis Testing 00:12 - The Fitness App Claim & Summary Statistics 00:53 - Setting up the Null & Alternative Hypotheses 02:01 - Choosing and Calculating the Test Statistic 02:25 - Determining Critical/Rejection Region 03:15 - Decision and Conclusion 03:27 - P-value approach (reject the null) 05:19 - Example 2: Increasing Variability (fail to reject the null) 06:43 - Impact of Changing Standard Deviation