Question

1. Suppose we are conducting a left tailed hypothesis test and find z_obs = −3.23.

a. Find the p-value.

b. If we are conducting the test at the 5% level of significance, would we reject or fail to reject H_o?

Answer 1

Solution :

This is the left tailed test .

The null and alternative hypothesis is ,

H0 :    =

Ha : <

Test statistic = z = -3.23

a ) P-value =0.0006

= 0.05  

P-value <

0.0006 < 0.05

b ) Reject the null hypothesis .

There is sufficient evidence to suggest that