Find a critical z for a alpha a equals 0.1 significance level test of the claim

critical-z

#1

Find a critical z for a alpha a equals 0.1 significance level test of the claim

Answer:

Given alpha = 0.1, critical z values for alpha=0.1 is
For two tailed alternative hypothesis, critical z=1.645
For two tailed, the area at the both tails will sum to 0.1 means we have to find z values such that area at each will be 0.05.