Refer to Exercise 60. a. Construct and interpret a 99% confidence interval for the difference between the
Question:
Refer to Exercise 60.
a. Construct and interpret a 99% confidence interval for the difference between the true means. If you already defined parameters and checked conditions in Exercise 60, you don’t need to do them again here.
b. Explain how the confidence interval provides more information than the test in Exercise 60.
Exercise 60.
In many parts of the northern United States, two color variants of the Eastern Gray Squirrel— gray and black—are found in the same habitats. A scientist studying squirrels in a large forest wonders if there is a difference in the sizes of the two color variants. He collects random samples of 40 squirrels of each color from a large forest and weighs them. The 40 black squirrels have a mean weight of 20.3 ounces and a standard deviation of 2.1 ounces. The 40 gray squirrels have a mean weight of 19.2 ounces and a standard deviation of 1.9 ounces. Do these data provide convincing evidence at the 
significance level of a difference in the mean weights of all gray and black Eastern Gray Squirrels in this forest?
Step by Step Answer:
a State the null and alternative hypotheses Null hypothesis H0 gray black Alternative hypothesis H1 ...View the full answer
