Question

The mean mass of the puppies at five months is 4.38 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):

4.22

4.55

4.50

4.47

4.29

4.56

4.52

4.39

4.32

4.55

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)  Do not reject  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

Answer 1

The statistical software output for this problem is :

(a)

Value of the test statistic = 1.460

Reject H₀ if t > -2.821

Do not reject  Reject  H₀

P-value = 0.0892