Question

8.2 What is/are the critical value(s) of the z-test statistic for this two-tailed hypothesis test, where α=0.05? Use the appropriate value(s) from the table. Use a comma and a space to separate answers as needed.

z0.10	z0.05	z0.025	z0.01	z0.005
1.282	1.645	1.960	2.326	2.576

Critical Value (s) :

Answer 1

8.2)

Solution :

  = 0.05

/ 2 = 0.05 / 2 = 0.025

Z_/2 = Z _0.025 = 1.96

Critical values are : -1.96 and +1.96