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Exam 1: Introduction

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Question 1

Multiple Choice

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A researcher has numbered all 50 states from 1 to 50 and has calculated a mean of 17.43 for the variable "state of birth."

A) Since the variable is nominal, the mean makes no sense
B) Since the variable is ordinal, we should treat the value of the mean with great caution
C) The variable is interval-ratio and the mean is an appropriate and useful statistic in this case
D) Since this variable is non-empirical, the mean should not be computed

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Question 2

Multiple Choice

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Computation of a mean (or average) is completely justified when a variable is measured at which level?

A) interval-ratio
B) ordinal
C) nominal
D) empirical

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Question 3

Multiple Choice

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Select the variable(s) that can be measured at the interval-ratio level

As we move up the left-hand side of the "Wheel of Science" we become more

An hypothesis states, in part, that "income increases as education increases". In this statement, income is

Addition and subtraction are completely justified only when variables are

The number of years that a couple has been happily married is an example of

In social research the purpose of statistics is to

If people who eat at fast food restaurants become obese, obesity is

Inferential statistics are necessary in social research because

Which of the following can be treated as an interval-ratio variable?

A nominal-level variable like marital status or gender is always

A researcher wants to know if there is a relationship between region of birth and political party affiliation. She should calculate a

You ask a sample of 27 students in a particular dorm on campus about their religious beliefs and use this information to make generalizations about all students in the dorm. In this research situation

An hypothesis states, in part, that "income increases as education increases". In this statement, education is

In the research process, the role of statistics is limited because

A public opinion poll that gauges the popularity of the President of the United States is an example of

Data is the same thing as

A researcher has calculated the mean for a variable that is ordinal in level of measurement.

The variable socioeconomic status ranges from upper class to lower class and is an example of the