A Suburban Realtor Is Studying Commuter Time in the Houston $\alpha$

Multiple Choice

A suburban realtor is studying commuter time in the Houston metropolitan area.She has been told the average weekday travel time from a southern suburb at 8:00am is 45 minutes.For five months she counts the number of days that it takes her more than 45 minutes to arrive in downtown when she leaves her house at 8:00am.She expects that data are uniformly distributed across the five months.Her sample of observed data yields the following frequencies 9 days, 15 days, 8 days, 11 days, 12 days.Using $\alpha$ = .01, the observed chi-square value is _______.

A) 1.18
B) 9.10
C) 21.75
D) 4.51
E) 2.73