Question 1

Scores for which of the following variables would necessarily be approximate numbers?

Accepted Answer

A)   family size
B)   annual income
C)   arm length
D)   units completed at the end of the first semester C

Question 2

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The average score of Miss Grady's class is a

Accepted Answer

A)   sample
B)   statistic
C)   parameter
D)   constant B

Question 3

The statement that a score of 120 represents a 20% improvement over a score of 100 is appropriate for

Accepted Answer

A)   an equal interval scale
B)   a ratio scale
C)   an interval scale
D)   a continuous variable B

Question 4

Descriptive: inferential as

Accepted Answer

A)   approximate:exact
B)   summarizing:accounting for chance
C)   quantitative:qualitative
D)   substantive:statistical

Question 5

Four kinds of cola drinks form

Accepted Answer

A)   a ratio scale
B)   an ordinal scale
C)   an interval scale
D)   a nominal scale

Question 6

If the weight of three objects is reported to be 97.0 pounds, their average weight (97.0/3) should be reported as

Accepted Answer

A)   32 pounds
B)   32.3 pounds
C)   32.33 pounds
D)   32.3333 pounds

Question 7

In an experiment, the dependent variable is

Accepted Answer

A)   a variable that might affect the outcome
B)   the variable manipulated by the investigator
C)   an example of a secondary variable
D)   the variable that is measured

Question 8

The purpose of descriptive statistics is to

Accepted Answer

A)   organize and summarize observations so that they are easier to understand
B)   infer something about conditions in a population from study of a sample
C)   to predict standing in one factor from knowledge of standing in another
D)   to determine whether there is a real difference between two (or more)  groups

Question 9

A research question is one that is about

Accepted Answer

A)   theory
B)   a numerical aspect of the observations
C)   the subject matter under investigation
D)   an abstract matter

Question 10

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The set of test scores for Miss Grady's class constitutes

Accepted Answer

A)   an element
B)   a sample
C)   a statistic
D)   a variable

Question 11

Which of the following recorded values is best viewed as a discrete variable?

Accepted Answer

A)   a temperature of 123 degrees
B)   an IQ of 121
C)   a piston diameter of 3.1273 inches
D)   a count of 36 telephones in a department store

Question 12

The highest level of measurement that we can be sure a score on this multiple-choice examination meets has the characteristics of

Accepted Answer

A)   a ratio scale
B)   an interval scale
C)   an ordinal scale
D)   a nominal scale

Question 13

If five students are ranked from best to worst in terms of potential for graduate study, the ranks form

Accepted Answer

A)   a ratio scale
B)   an interval scale
C)   an ordinal scale
D)   a nominal scale

Question 14

A marketing analyst surveys the brand of cola drink preferred by adult women. Brand of cola drink is

Accepted Answer

A)   a quantitative variable
B)   a qualitative variable
C)   a constant
D)   an ordinal variable

Question 15

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The set of test scores for these children constitutes

Accepted Answer

A)   an element
B)   a sample
C)   a parameter
D)   a population

Question 16

In the ordinary course of investigation, statistical matters

Accepted Answer

A)   precede research matters
B)   follow research matters
C)   intervene between the research question and the research conclusion
D)   form the beginning and end of the study

Question 17

A statistical question

Accepted Answer

A)   is developed from a research question
B)   precedes development of a research question
C)   is independent of the research question
D)   is developed from the research conclusion

Question 18

The idea of a random sample is particularly important for

Accepted Answer

A)   descriptive statistics
B)   statistical inference
C)   measuring degree of association
D)   all of the above

Question 19

A researcher is interested in studying hand-eye coordination of second-grade boys at Honey Island Elementary School. She selects four boys for study and finds that they all receive the same score. In this study, hand-eye coordination is

Accepted Answer

A)   a quantitative variable
B)   a qualitative variable
C)   a quantitative constant
D)   a qualitative constant

Question 20

In an experiment, the variable that is manipulated by the investigator is called the

Accepted Answer

A)   research variable
B)   independent variable
C)   dependent variable
D)   statistical variable

Exam 1: Introduction