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# 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.

The data was obtained from car crash experiments. The table values are the chest deceleration data​ (g) for the dummy in the​ driver'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 are​ safer?

​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 be​ rejected?

A.

No

No​, because the​ P-value is greater than

greater than the significance level.

B.

Yes

Yes​, because the​ P-value is greater than

greater than the significance level.

C.

No

No​, because the​ P-value is less than

less than the significance level.

D.

Yes

Yes​, because the​ P-value is less than

less than the significance level.

Do the data suggest that larger cars are​ safer?

A.

No. The null hypothesis is​ rejected, but the data suggest that the mean deceleration for larger cars is​ larger, not smaller.

B.

No

No​, because the null hypothesis is not

is not rejected. There is not sufficient evidence to

There is not sufficient evidence to state that

state that any of the

any of the means are

means are different

different from the

from the rest.

rest.

C.

Yes

Yes​, because the null hypothesis is

is rejected. The data suggest that the mean

The data suggest that the mean deceleration

deceleration for larger

for larger cars is

cars is smaller.

smaller. nothing

nothing

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