Exam 1: Introduction to Statistics

The weight (in pounds)of a newborn infant is an interval scale measurement.

Categorical data are one example of discrete data.

Researcher A measures academic preparedness as the percent correct responses on an entrance exam;Researcher B measures academic preparedness as the current class rank of students.Which researcher measured academic preparedness as discrete data?

Continuous data are strictly distributed in discrete units.

The use of tables and graphs to summarize data is an example of

A researcher records the time it takes to complete a memory task in a sample of 25 participants.He finds that the average participant completed the test in 43 seconds.The average time to complete this task is called a(n)

Three key elements of control that allow researchers to draw cause-and-effect conclusions are

A psychologist reviews her notes for all her patients and determines that on average her patients complete therapy in 24 days.The average time to complete therapy among all her patients is called a(n)

A therapist observes that spouses are more likely to forgive their partners for lying to them if they find out the truth from their spouse and not a third party.In this example,the dependent variable is

________ are measured in whole units or categories that are not distributed along a continuum.

The number of students in a class is an example of discrete,quantitative data.

A characteristic (usually numeric)that describes a population is called a

Which of the following research designs is used to determine the causes of behavior that help to explain why the behavior occurs?

Suppose that a researcher is interested in a group of 10 million people who paid to see a movie playing in theaters.In this example,the 10 million moviegoers would be regarded as

Descriptive statistics is a branch of mathematics used to make inferences about populations given samples of data.

Which of the following terms are least likely to be used to describe qualitative data?

Descriptive statistics can be used to describe populations and samples.

You are interested in measuring the construct,reinforcement.Which of the following measures for this construct is quantitative and continuous?

Many researchers who measure qualitative variables will also measure those that are quantitative in the same study.

Which of the following measures of attraction is an example of a ratio scale measurement?