You are testing H0 u0 against Ha u0 based on an SRS of 20 ob

You are testing H0: u=0 against Ha: u>0 based on an SRS of 20 observations from a Normal population. What values of the z-statistic are statistically significant at the alpha=.005 level? (Please show work)

Solution

H0: u=0 against Ha: u>0

One tailed test

n = 20

z statistic = significant =

-3<=z<=3

For statistically significant

z <=-3 or z >=+3