1.13 Sampling and data: homework  (Page 2/4)

A cardiologist is interested in the mean recovery period for her patients who have had heart attacks. Define the following in terms of the study. Give examples where appropriate.

• a Population
• b Sample
• c Parameter
• d Statistic
• e Variable
• f Data

Insurance companies are interested in the mean health costs each year for their clients, so that they can determine the costs of health insurance. Define the following in terms of the study. Give examples where appropriate.

• a Population
• b Sample
• c Parameter
• d Statistic
• e Variable
• f Data

A politician is interested in the proportion of voters in his district that think he is doing a good job. Define the following in terms of the study. Give examples where appropriate.

• a Population
• b Sample
• c Parameter
• d Statistic
• e Variable
• f Data

A marriage counselor is interested in the proportion the clients she counsels that stay married. Define the following in terms of the study. Give examples where appropriate.

• a Population
• b Sample
• c Parameter
• d Statistic
• e Variable
• f Data

Political pollsters may be interested in the proportion of people that will vote for a particular cause. Define the following in terms of the study. Give examples where appropriate.

• a Population
• b Sample
• c Parameter
• d Statistic
• e Variable
• f Data

A marketing company is interested in the proportion of people that will buy a particular product. Define the following in terms of the study. Give examples where appropriate.

• a Population
• b Sample
• c Parameter
• d Statistic
• e Variable
• f Data

Airline companies are interested in the consistency of the number of babies on each flight, so that they have adequate safety equipment. Suppose an airline conducts a survey. Over Thanksgiving weekend, it surveys 6 flights from Boston to Salt Lake City to determine the number of babies on the flights. It determines the amount of safety equipment needed by the result of that study.

• a Using complete sentences, list three things wrong with the way the survey was conducted.
• b Using complete sentences, list three ways that you would improve the survey if it were to be repeated.

Suppose you want to determine the mean number of students per statistics class in your state. Describe a possible sampling method in 3 – 5 complete sentences. Make the description detailed.

Suppose you want to determine the mean number of cans of soda drunk each month by persons in their twenties. Describe a possible sampling method in 3 - 5 complete sentences. Make the description detailed.