Question

Using the z table (table E) find the critical value (or values) for the case where a=0.01, two tailed test.

Using the z table (table E) find the critical value (or values) for the case where a=0.05, right tailed test

Using the z table (table E) find the critical value (or values) for the case where a=0.02, left tailed test.

Answer 1

Solution :

1)

$\alpha$ = 0.01

$\alpha$ / 2 = 0.01 / 2 = 0.005

Z_$\alpha$/2 = Z _0.005 = 2.576

Critical value = 2.576

2)

Critical value = 1.645

3)

Critical value = -2.054

Answer 2

α = 0,05