# Question: As part of a research program for a new cholesterol

As part of a research program for a new cholesterol drug, Johnson Pharmaceuticals would like to investigate the linear relationship between the ages and LDL (low density lipoprotein) cholesterol levels of men. The following data set shows the ages and LDL cholesterol levels of seven randomly selected men:

a. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 30 year old man.

b. Verify your results with PHStat.

a. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 30 year old man.

b. Verify your results with PHStat.

## Answer to relevant Questions

Use the data in Problem 14.26 to construct a 95% prediction interval to estimate the LDL cholesterol level of a 30 year old man. Verify your results with PHStat. In Problem Consider the following set of ordered pairs: Assuming that the regression equation is y = 1.886 + 0.977x and that the SSE = 0.7955, test to determine if the slope is not equal to zero using α = 0.05. Using the data in Problem 14.38, construct a 95% confidence interval for the regression slope. In Problem Answer the following questions using the data from Problem 14.42: a. Using α = 0.05, test for the significance of the regression slope. b. Construct a 95% confidence interval for the population slope. In Problem Answer the following questions using the data from Problem 14.53: a. Calculate the coefficient of determination. b. Using α = 0.05, test the significance of the population coefficient of determination. c. Construct a 95% ...Post your question