A nearby city has four districts: A, B, C, and D. The police chief wants to determine whether there is a difference in the mean number of crimes committed amond the four districts. He examines the records from four randomly selected days and recorded the number of crimes.

ABCD

13211216

15131417

14181518

15191315

At the10% significance level, can the Chief conclude there is a difference in the mean number of crimes among the four districts?

a.	There are differences in the mean number of crimes among the four districts; the critical value is approx 2.61.
b.	There are differences in the mean number of crimes among the four districts; the critical value is approx 3.91.
c.	There are differences in the mean number of crimes among the four districts; the critical value is approx 3.49.
d.	There areno differencesamong the four districts in the mean number of crimes; the p value is approx 3.49.