The data was obtained from car crash experiments. The table values are the chest deceleration data(g) for the dummy in thedriver's seat. Use a 0.05

0.05 significance level to test the null hypothesis that the different weight categories have the same mean. Do the data suggest that larger cars aresafer?

Subcompact:

55

55

51

51

53

53

56

56

57

57

Compact:

54

54

51

51

45

45

55

55

50

50

Midsize:

53

53

55

55

50

50

53

53

51

51

Full-size:

49

49

40

40

42

42

41

41

43

43

Should the null hypothesis berejected?

A.

No

No, because theP-value is greater than

greaterthan the significance level.

B.

Yes

Yes, because theP-value is greater than

greaterthan the significance level.

C.

No

No, because theP-value is less than

lessthan the significance level.

D.

Yes

Yes, because theP-value is less than

lessthan the significance level.

Do the data suggest that larger cars aresafer?

A.

No. The null hypothesis isrejected, but the data suggest that the mean deceleration for larger cars islarger, not smaller.

B.

No

No, because the null hypothesis is not

isnot rejected. There is not sufficient evidence to

Thereisnotsufficientevidenceto state that

statethat any of the

anyofthe means are

meansare different

different from the

fromthe rest.

rest.

C.

Yes

Yes, because the null hypothesis is

is rejected. The data suggest that the mean

Thedatasuggestthatthemean deceleration

deceleration for larger

forlarger cars is

carsis smaller.

smaller. nothing

nothing