Exam 1: The Nature of Probability and Statistics

A dependent variable can also be referred to as an outcome variable.

How are statistics important in our everyday lives, and why do we need to understand them?

Based on her electric bills from last year, Mrs. Smith expects she will be paying $75/month this year. This is an example of descriptive statistics.

If you were told that four students from a class of twenty were questioned for a poll about study habits, this would be an example of ________________.

A ______________ variable assumes values that can be counted.

Questioning every 14th customer leaving a theatre about the movie they had seen, would be an example of systematic sampling.

Each value in a data set may be referred to as either a data value or a(n) ____________.

What level of measurement allows for the ranking of data, a precise difference between units of measure, and also includes a true zero?

In an experimental study, manipulation of the_______________ variable is studied to see if it leads to changes in the _______________variable.

Statistics is the science of conducting studies to

An independent variable can also be called a(n)

What level of measurement would be applied when doing a survey on the average American's shoe size?

A magazine tests a new car and reports that it could be twice as much fun to drive. This is NOT an example of

In which branch of statistics would a researcher acquire twenty-five 2000 Toyota Celicas, drive them until they had a major mechanical failure, record the final mileage, and then write a report for Car and Driver?

A television station interviews five movie viewers after the first showing of a movie. After finding out that all five enjoyed the movie very much, the reporter states that this movie will definitely be a big hit. This is an example of ____________________.

What type of sampling is being employed if the country is divided into economic classes and a sample is chosen from each class to be surveyed?

If a weather center monitors and calculates the average number of tornadoes that pass through Topeka, Kansas each year, what type of variable would they be investigating?

Which branch of statistics would employ probability to predict how many miles one should be able to drive a 2000 Toyota Celica during its lifetime?

The four basic methods used to obtain samples are: random, irregular, cluster, and stratified sampling.

Determining the number of people from the state of Alaska who voted for a Republican in the last election is an example of ______________ measurement.