determine the critical region and critical values for z thatwould be used to tes

Question

determine the critical region and critical values for z thatwould be used to test the null hypothesis at the given level ofsignificance, as described in each of the following: a)Ho: u </= 30 and Ha: u >30 a= 0.05 b) Ho :u = 25 and Ha: u not equal to 25 a=0.01 c) Ho: u >/= 20 and Ha: u < 20 a=0.01 determine the critical region and critical values for z thatwould be used to test the null hypothesis at the given level ofsignificance, as described in each of the following: a)Ho: u </= 30 and Ha: u >30 a= 0.05 b) Ho :u = 25 and Ha: u not equal to 25 a=0.01 c) Ho: u >/= 20 and Ha: u < 20 a=0.01

Explanation / Answer

(a) Z(0.05) =1.645 (check normal table) The critical region is Z>1.645 (b) Z(0.025)=1.96 (check normal table) The critical region is Z1.96 (c) Z(0.01)=2.326 (check normal table) The critical region is Z

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