Dr. Nkrumah studies white-footed mice in the Konza Prairie in Kansas. Recently he has noticed that a new species of grass (martin grass) has appeared in one of his study areas. The seeds of this new plant seemed to be used by the mice as a food source and recent captures of mice in the area indicate that the mice in the area are increasing in overall weight. To determine if this new food source is causing the increase in mice weight Dr. Nkrumah has captured 60 mice from his site. He weighs each mouse and then places each into a separate cage. All the mice are kept in the same chamber, with the same light and temperture conditions. Half of the mice are given a diet consisting of entirely of wheat seeds (normal diet), and the other half are feed a diet that consist of 50% wheat seeds and 50% martin grass seeds. The volume of each diet is the same. He feeds the mice these diets for two weeks and then weighs each mouse. Answer the questions below.

a. A with would best represent these data and help Dr. Newton evaluate the hypothesis.
b. Determine the closest critical value if we want a 95% confidence level. Remember that this is a one-tailed test. Write the the closest approximatel number to 3 decimals.
c. Based on this data, is it true that Dr. Newton can reject the null hypothesis?
d. Is it true that the results of this analysis support Dr. Newton's hypothesis that the new seed (martin seeds) are likely to be responsible for the increase in mice weights?