1.Some suggest that a diet high in carbohydrates make athletes run faster. In Group A, 7 athletes received a diet high in carbohydrates. In Group B, 7 different athletes continued to eat their normal diet. After a month, the two groups performed a timed 100-meter test to see if there was a difference in average times between the two groups.

High Carb Diet Normal Diet

12 13

12.5 12.6

11.7 12.2

11.9 13

13 12

12.4 12.1

14 12.3

a.State the null hypothesis.

b.What is the appropriate statistical test?

c.Calculate the test statistic.

d.State your conclusion.