# Question: Explain whether you think the Rule for Sample Means applies

Explain whether you think the Rule for Sample Means applies to each of the following situations. If it does apply, specify the population of interest and the measurement of interest. If it does not apply, explain why not.

a. A researcher is interested in what the average cholesterol level would be if people restricted their fat intake to 30% of calories. He gets a group of patients who have had heart attacks to volunteer to participate, puts them on a restricted diet for a few months, and then measures their cholesterol.

b. A large corporation would like to know the average income of the spouses of its workers. Rather than go to the trouble to collect a random sample, they post someone at the exit of the building at 5 p.m. Everyone who leaves between 5 p.m. and 5: 30 p.m. is asked to complete a short questionnaire on the issue; there are 70 responses.

a. A researcher is interested in what the average cholesterol level would be if people restricted their fat intake to 30% of calories. He gets a group of patients who have had heart attacks to volunteer to participate, puts them on a restricted diet for a few months, and then measures their cholesterol.

b. A large corporation would like to know the average income of the spouses of its workers. Rather than go to the trouble to collect a random sample, they post someone at the exit of the building at 5 p.m. Everyone who leaves between 5 p.m. and 5: 30 p.m. is asked to complete a short questionnaire on the issue; there are 70 responses.

## Relevant Questions

Explain whether you think the Rule for Sample Means applies to each of the following situations. If it does apply, specify the population of interest and the measurement of interest. If it does not apply, explain why not. a. ...Suppose you are interested in estimating the average number of miles per gallon of gasoline your car can get. You calculate the miles per gallon for each of the next nine times you fill the tank. Suppose, in truth, the ...Carry out the simulation in Mini-Project # 1 using a computer or website instead of physically doing so. Go through the same steps and answer the same questions. In Example 20.5, we found a 95% confidence interval for the proportion of successes likely in a certain kind of ESP test. Construct a 99.7% confidence interval for that example. Explain why a skeptic of ESP would prefer to ...Refer to News Story 13 and the accompanying report on the book’s website, “2003 CASA National Survey of American Attitudes on Substance Abuse VIII: Teens and Parents.” a. The margin of error for the teens and for the ...Post your question