Question

A graphing calculator is recommended.

Three students, Linda, Tuan, and Javier, are given five laboratory rats each for a nutritional experiment. Each rat's weight is recorded in grams. Linda feeds her rats Formula A, Tuan feeds his rats Formula B, and Javier feeds his rats Formula C. At the end of a specified time period, each rat is weighed again, and the net gain in grams is recorded. Using a significance level of 10%, test the hypothesis that the three formulas produce the same mean weight gain. (Let 1 = Linda's rats, 2 = Tuan's rats and 3 = Javier's rats.)

Weights of Student Lab Rats
Linda's rats	Tuan's rats	Javier's rats
45.3	48.7	52.7
40.9	42.0	42.2
42.8	40.2	39.5
47.7	47.6	46.9
40.0	45.6	50.1

1) What is the p-value? (Round your answer to four decimal places.)

A graphing calculator is recommended.

A researcher wants to know if the mean times (in minutes) that people watch their favorite news station are the same. Suppose that the table below shows the results of a study.

CNN	FOX	Local
45	16	72
13	43	37
18	68	56
38	50	60
23	31	51
35	22

Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05. (Let 1 = CNN, 2 = FOX, and 3 = Local.)

1)What is the test statistic? (Round your answer to two decimal places.)

2) What is the p-value? (Round your answer to four decimal places.)

Answer 1

1)

pvalue = 0.5582

we don't reject theHo

conclusion--

three formulas have same mean weight gain