Find the critical value zc that is necessary to form a confidence interval at the level...

Find the critical value z_c that is necessary to form a confidence interval at the level of confidence shown below.

c=0.81

z_c=

Expert Solution

alpha = 1 - 0.81 = 0.19

Z_alpha/2 = Z_0.095 = 1.31 (ans)

orchestra answered 1 year ago

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