Exam 1: Making Sense of Variability: an Introduction to Statistics

A professor surveys a sample of 25 students to find how many hours per week they work at a job. She finds the typical number of hours reported is 15. The value of 15 hours is a(n).

A measurement obtained from a participant in an experiment is called a(n).

Which of the following gives a numerical description of the extent and direction of the relationship between two sets of scores?

Population values inferred from statistics of a sample are called.

In an experiment, the variable that is manipulated to determine its effect on behavior is called the variable.

If a researcher used an experiment to test two different methods of teaching geometry, then the dependent variable could be the.

A is a complete set of people, animals, objects, or events sharing a common characteristic.

An independent variable is in an experiment.

An experiment that creates two or more groups uses a(n) design.

If a researcher used an experiment to assess whether or not a certain drug would increase reading comprehension scores, then the independent variable would be the.

People who participate in research studies often are called.

A(n) is a statement of the expected or predicted relationship between two or more variables.

An experimenter created two different groups of participants and gave each group a different instructional program on the anatomy of the eye. After the instructional program each group was given a multiple choice test to assess their knowledge of the eye. In this experiment, the instructional program condition was the variable.

If a researcher used an experiment to test two different methods of teaching geometry, then the independent variable would be the.

A sample is.

A parameter is.

A(n) allows a researcher to estimate the possibility of chance differences between groups.

A single number used to describe data from a sample is a.

A dependent variable is in an experiment.

A chance difference refers to.