Quiz 4 in STA 6166: Hypothesis Testing for Variance, Quizzes of Data Analysis & Statistical Methods

Download Quiz 4 in STA 6166: Hypothesis Testing for Variance and more Quizzes Data Analysis & Statistical Methods in PDF only on Docsity! STA 6166 Quiz No. 4 Spring %meter Name: f First Please write your answers in the appropriate spaces. Please write clearly and justify your answers. 1. (14 points) The sample wianceof asample of size n = 26 is equal to s2 = 16.7. (a) (6 points) Can we conclude that the popdabion variance u2 is larger than 10 at the cu = .05 level? (State Ho and Ha, d r ~ w the rejection region, do the testing, then state your rrlL/ ~ ' 7 1 3 (YI-QLfZ G 2 (b) (3 points) What aumption is needed for the validity of the test in pmt (a) '? T4 pop JJ;v~ m 4 - 4 -4" 0-b 2 h d a 8 (c) (5 points) Obtain a 95% confidence interYeal on e2. Give a h an interpre- 2 S F 1.6.7- /gZ( ZS B 11.7 yo. 6 5; 1 T t 1 2