Stat 215 Assignment 20

Stat 215 Assignment 20 - Stat 215 Assignment 20 Module...

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Stat 215 Assignment 20 Module: HypTest , Exercise: Exer1 Objective : This exercise demonstrates what is meant by the significance level of a test and how the power is influenced by the variability, sample size, and the significance level. Problem Description : Display the power of an upper-tailed one-sample z-test for a hypothesized µ of 0 for the default mean difference (delta = 1), variability (sigma = 1), sample size (n = 5), and significance level (alpha = 0.05). Change sigma to 2 and the sample size to 10. You will need the normal Java applet to answer Question #3. Question The critical value is 1.0407. Show how this value is calculated. Answer Critical value = 1.6453 x (2 / sqrt(10)) = 1.0406. 1.645 is the 95th percentile of the standard normal distribution. Your Answer Critical value is the null value plus the z-value times the standard error of the mean Grader Comments (none) Grade 1.0 (out of 1.0) Total 7.8 (out of 10.0) Question As delta is changed, the critical value remains 1.0407. Explain why. Answer
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Stat 215 Assignment 20 - Stat 215 Assignment 20 Module...

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