Calculate Z critical for each of the below situations A alph

Calculate Z critical for each of the below situations.

A) alpha = .05 2 tail, n=100
B) alpha = .01 2 tail, n=100
C) alpha = .05 1 tail, n=100
D) alpha = .01 1 tail, n=100
E) alpha = .05 2 tail, n=10
F) alpha = .1 2 tail, n=100

Solution

z-crtical values does not depend upon sample size.

(A)

Here test is two tailed and level of significance is 0.05 so critical value of z are -1.96 and 1.96.

(B)

Here test is two tailed and level of significance is 0.01 so critical value of z are -2.58 and 2.58.

(C)

Here test is one tail (right tailed) and level of significance is 0.05 so critical value of z is 1.645.

Here test is one tail (left tailed) and level of significance is 0.05 so critical value of z is -1.645.

(D)

Here test is one tail(right tailed) and level of significance is 0.01 so critical value of z is 2.33.

Here test is one tail(left tailed) and level of significance is 0.01 so critical value of z is -2.33.

(E)

Here test is two tailed and level of significance is 0.05 so critical value of z are -1.96 and 1.96.

(F)

Here test is two tailed and level of significance is 0.10 so critical value of z are -1.645 and 1.645.