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Exam 1: Introduction to Statistics

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Question 1

Multiple Choice

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Quantitative measures can be

A) discrete data
B) continuous data
C) both a and b

D) B) and C)
E) A) and C)

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Question 2

Multiple Choice

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A researcher tests whether the dosage level of some drug (low,high) causes significant differences in health.To do this,the researcher randomly assigns rat subjects to receive a low or high dosage of the drug and records health-related measures in both groups.The type of method described is

A) experimental
B) quasi-experimental
C) correlation
D) operational

E) A) and D)
F) B) and C)

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Question 3

Multiple Choice

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Interval scales of measurement

A health practitioner measures the heart rate (in beats per minute) of patients under low,moderate,and high stress levels.Heart rate can be best described as

Each of the following are interval scale measurements,except

An ordinal scale of measurement is more informative than an interval scale of measurement.

An education counselor records the number of high school graduates enrolled in community colleges,four-year colleges,and universities.What scale of measurement is the type of college?

The duration of drug use (in months)is a ratio scale measurement.

Researchers often measure sample statistics to estimate or learn more about parameters in populations from which the sample statistics were measured.

Researchers measure data in a ________ to learn more about individuals in the larger _______ of interest.

A researcher observes the number of tasks completed by male and female participants during a multitasking observation period.In this example,sex (male,female)is the quasi-independent variable.

Descriptive statistics are procedures used to

________ data describe numeric aspects of phenomena;whereas ________ data describe nonnumeric aspects of data.

An animal researcher measures the number of times a rat presses a lever located at the right,center,and left of a cage for a food reward.What scale of measurement is the location of lever pressing?

To understand chimpanzee behavior in general,a scientist observes the hierarchy or dominance behavior of a family of male chimpanzees in a naturalistic setting.In this example,the scientist observes the behavior of a population of chimpanzees.

A student's letter grade (A,B,C,D,F)is a nominal scale measurement.

Most scientists have limited access to the phenomena they study,especially behavioral phenomena.

A researcher measures the body temperature (in degrees Fahrenheit) of participants immediately before and immediately following sleep.Temperature is on what scale of measurement?

A consultant ranks the five most needed areas of improvement for a local business.What scale of measurement are the rankings?

A score on a multiple-choice exam (0-100 points)is a ratio scale measurement.