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Exam 1: Introduction

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Question 1

Multiple Choice

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The purpose of descriptive statistics is to

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

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

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Question 2

Multiple Choice

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In the ordinary course of investigation, statistical matters

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

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

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Question 3

Multiple Choice

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

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

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

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

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

In an experiment, the dependent variable is

A statistical question

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

Four kinds of cola drinks form

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

The idea of a random sample is particularly important for

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

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

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

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

A research question is one that is about

Descriptive: inferential as

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