# Question: Combine the data from the separate therapies in Exercise 3 7

Combine the data from the separate therapies in Exercise 3.7 into a single data set, and construct a relative frequency histogram for this combined data set. Does the plot indicate that the data are from two separate populations? Explain your answer.

In exercise

In exercise

**View Solution:**## Answer to relevant Questions

Although an exhaust fan is present in nearly every bathroom, it often is not used due to the high noise level. This is an unfortunate practice because regular use of the fan results in a reduction of indoor moisture. ...Experts consider high serum cholesterol levels to be associated with an increased incidence of coronary heart disease. Suppose that the natural logarithm of cholesterol levels for males in a given age bracket is normally ...Random samples of size 5, 20, and 80 are drawn from a population with a mean of μ = 100 and a standard deviation of σ = 15. a. Give the mean of the sampling distribution of y for each of the three sample sizes. b. Give ...A credit union takes a sample of four mortgages each month to survey the homeowners’ satisfaction with the credit union’s servicing of their mortgage. Each mortgage is classified as a fixed rate (F) or variable rate (V). ...Is it possible for events A and B to be both mutually exclusive and independent? Justify your answer.Post your question