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

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