Question

The mean mass of the puppies at five months is 4.37 kg. The masses follow the normal distribution. In an effort to increase their mass, a supplement is added to their daily meals. The subsequent masses of a sample of five-month-old puppies were (in kilograms):

4.37

4.55

4.54

4.22

4.57

4.60

4.20

4.48

4.51

4.49

a. At the 0.01 level, has the supplement increased the mean mass of the puppies? (Round the final answer to 3 decimal places. Negative answers should be indicated by a minus sign.)

Value of the test statistic

Reject H₀ if t >  .

(Click to select)  Reject  Do not reject  H₀. There is  (Click to select)  not enough  enough  evidence to conclude that the additive increased the mean weight of puppies.

b. Determine or estimate the p-value. (Round the final answer to 4 decimal places.)

  

Answer 1

The statistical software output for this problem is :

(a)

Test statistics = 1.842

Reject H₀ if t >  -2.821

Do not reject  H₀

There is not enough  enough  evidence to conclude that the additive increased the mean weight of puppies.

P-value = 0.0493