test 4

Question 1

Tabulation refers to the orderly arrangement of data in a summary forma

Answer 1

true

Question 2

Choosing the right statistic boils down to what type and how many variables are involved in a particular research
question or hypothesis

Answer 2

true

Question 3

In a regression equation, the beta coefficients indicate the effect on the dependent variable of a 1-unit increase in any of
the independent variables

Answer 3

true

Question 4

The purpose of a table in a research report is to summarize and communicate the meaning of the data to the reader

Answer 4

true

Question 5

Multivariate statistical analysis permits the researcher to consider more than one dependent variable at the same time

Answer 5

true

Question 6

The main reason a large sample size is desirable is that sample size is related to random sampling error

Answer 6

true

Question 7

In multiple regression, the dependent variable must be continuous and interval-scaled

Answer 7

true

Question 8

Cross-tabulation allows the inspection and comparison of differences among groups based on nominal or ordinal
categories

Answer 8

true

Question 9

The t-test is appropriate for small sample sizes with unknown standard deviations

Answer 9

true

Question 10

Coding involves assigning some representative value to units of data having similar meaning

Answer 10

true

Question 11

When the difference between two groups is measured, bivariate statistics are used.

Answer 11

true

Question 12

One hundred percent of the scores in a normal distribution fall within plus or minus two standard deviations of the
mean

Answer 12

false

Question 13

A Type II error occurs when the researcher rejects the null hypothesis when, in fact, it is true

Answer 13

false

Question 14

In a regression equation, the slope of the line, , is the change in X that is due to a corresponding change of one unit of
Y

Answer 14

false

Question 15

Multiple regression analysis includes a single independent variable but several dependent variables

Answer 15

false

Question 16

Nonresponse bias causes problems because it means that the sampling units that participated are different from those
that did not participate

Answer 16

true

Question 17

The mode is the measure of central tendency that identifies the value that occurs most often

Answer 17

true

Question 18

The row and column totals in a contingency table are called subtotals because they are less than the total

Answer 18

false

Question 19

If a researcher is interested in whether adult males purchase a product more frequently than adult females, univariate
statistics would be used in the analysis of data

Answer 19

false

Question 20

ANOVA and Linear Regression are among the most common forms of the general linear model (GLM)

Answer 20

true

Question 21

What are some of the most common statistical software packages?

Answer 21

SPSS, SAS and EXCEL

Question 22

What is another form of the alternative hypothesis when testing the difference between the means of the two groups?

Answer 22

1 - 2  0

Question 23

Which analysis is portrayed by the equation:

Answer 23

multiple regression

Question 24

The formula below is used to compute

Answer 24

variance

Question 25

When students tardiness is used to predict the test performance of students in a regression equation, student tardiness is the ____ variable and test performance is the ____ variable

Answer 25

independent; dependent

Question 26

Failing to identify a hypothesized difference using a sample result when a difference really does exist in the population is a ____ error

Answer 26

type II

Question 27

All of the following are characteristics of the standardized normal distribution EXCEPT that it ____

Answer 27

has a mean of 1 and a standard deviation of 0

Question 28

What is the first step in interpreting a multiple regression model?

Answer 28

Examine the model F-test

Question 29

A study compares the means of two groups in which there are 45 males in Group 1 and 37 females in Group 2. The degrees of freedom for this study when using the t-test for the difference between means is ___

Answer 29

80

Question 30

What is the most useful distribution in inferential statistics

Answer 30

standardized normal distribution

Question 31

In the regression equation, Y = a +  X, a is the symbol for the ___

Answer 31

intercept of the regression line

Question 32

Suppose the price of MP3 players in Denver range from $59 to $179. Then, the range of these prices is __

Answer 32

120

Question 33

Which of the following is the symbol for the sample standard deviation?

Answer 33

S

Question 34

When a researcher wants to estimate national market share based on the results of the test market for a new product in St. Louis and Kansas City, this is an example of:

Answer 34

Inferential statistics

Question 35

Counting the different ways respondents answered a question and arranging them in a simple summary form yields a(n) ____

Answer 35

marginal tabulation

Question 36

In the regression equation, Y = a + B X , B is the

Answer 36

slope of the regression line

Question 37

In comparing the difference of the means between two groups, the null hypothesis can also be stated as ____

Answer 37

u1 - u2 = 0

Question 38

In a test marked study, 206 out of a sample of 560 people state that they "liked” the product being studied. The proportion of people in this study who said that they liked this product was about:

Answer 38

37

Question 39

The formula given below represents the method for calculating the

Answer 39

x2 test

Question 40

The midpoint of a set of numbers is referred to as the __

Answer 40

median