stats chapter 1
In statistics a population is a. the entire group to which a law of nature applies. b. a subset of a group to which a law of nature applies. c. all the people in the world. d. an infinite number that cannot be counted.
a
A representative sample is one a. created by selecting only those participants determined to be representative of the larger population. b. having characteristics accurately reflecting the characteristics of the population. c. based on the luck of the draw. d. known to be a biased sample.
b
A statistics class has 60% females and 40% males. A researcher selects a sample having 80% males and 20% females. Why should the researcher be cautious of making inferences about the entire class based on the sample? a. Because the sample appears to be representative of the population. b. Because the sample appears to be unrepresentative of the population. c. Because the opinions of the females in the sample will not be the same as those of the females in the population. d. Because the sample was too small.
b
In research, the aspects of the situation or behavior we measure are called a. scores. b. variables. c. relationships. d. samples and populations.
b
In statistics, a sample is a. the entire group to which a law is applied. b. a subset of a group to which a law is applied. c. all of the subjects in which we are interested d. at least half of the subjects in the population.
b
When a change in the scores of one variable is accompanied by a consistent change in the scores of another variable, we have what is known as a a.cause-and-effect explanation. b.relationship. c. variable. d. set of scores.
b
Which of the following is a variable? a. The number of students in your statistics class today] b. The date and month of the 4th of July c. The height of the players on a basketball team d. Your latest test score
c
Which of the following is not a purpose of statistical procedures? a. Organizing data b. Summarizing data c. Hypothesizing data d. Communicating data
c
The individuals measured in a sample are called the a. scores. b. population. c. observations. d. participants.
d
