{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Stat 215 Assignment 20

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

This preview shows pages 1–2. Sign up to view the full content.

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

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 2

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

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online