1. Assume that a simple random sample has been selected from anormlly distribute

Question

1. Assume that a simple random sample has been selected from anormlly distributed population. Find the test statistic t.
Test the claim that for te adult population of one town, the meanannual salary is given by =$30,000. Sample data aresummarized as n=17, - =$22,298, and s= $14,200. Use a significancelevel of = 0.05                                                           x A. -2.24 B. -1.57 C. 1.57 D. 2.24 E. 0.05 1. Assume that a simple random sample has been selected from anormlly distributed population. Find the test statistic t.
Test the claim that for te adult population of one town, the meanannual salary is given by =$30,000. Sample data aresummarized as n=17, - =$22,298, and s= $14,200. Use a significancelevel of = 0.05                                                           x A. -2.24 B. -1.57 C. 1.57 D. 2.24 E. 0.05

Explanation / Answer

1. the test statistic t=(x-bar - )/(s/n)=(22298-30000)/(14200/17)=-2.24 2. the test statistic t=(137-132)/(14.2/20) = 1.57 critical value is t(0.05, df=n-1=19)=1.73 Since t=1.57

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