A national grocerSolutionn 24 avg waiting time 65 distribu

A national grocer

Solution

n = 24 avg waiting time = 6.5

distribution for no of shoppers arriving is 5.9 min and std dev =2.5 min

H0: mu = 6.5

Ha: mu <6.5

left tailed hypohtesis test.

A) Decision rule is if p < 0.025, reject H0

Or if t statistic > 2.07, reject H0

B) Value of test statistic = (5.9-6.5)/std error: Std error = 2.5/rt 23 = 0.521

p value =0.3036

Accept null hypothesis.