Randomly selected deaths of motorcycle riders in a region of the northern hemisphere are summarized in the accompanying table. Use a

0.05 significance level to test the claim that such fatalities occur with equal frequency in the different months. How might the results beexplained?

Month

Jan.

Feb.

March

April

May

June

Number

9

11

12

13

22

27

Month

July

Aug.

Sept.

Oct.

Nov.

Dec.

Number

27

29

25

14

11

6

Determine the null and alternative hypotheses.

H0:

At least one month has a different frequency of fatalities than the other months.

Fatalities occur with the same frequency in the different months of the year.

At least two months have a different frequency of fatalities than the other months.

Fatalities occur with all different frequencies on the different months of the year.

H1:

At least two months have a different frequency of fatalities than the other months.

Fatalities occur with all different frequencies on the different months of the year.

Fatalities occur with the same frequency in the different months of the year.

At least one month has a different frequency of fatalities than the other months.