Test 4

Question 1

Tabulation refers to the orderly arrangement of data in a summary format.

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

truw

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

*b. u1 - u2 not equal 0

Question 23

Which analysis is portrayed by the equation: Y = bo + 1X1 + 2X2 + 3X3… + nXn?

Answer 23

multiple regression

Question 24

look at formula for 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 25

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

Answer 25

type 2

Question 26

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

Answer 26

has a mean of 1 and a standard deviation of 0

Question 27

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

Answer 27

Examine the model F-test.

Question 27

What is the most useful distribution in inferential statistics?

Answer 27

standardized normal distribution

Question 28

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 28

80

Question 29

31. In the regression equation, Y = a +  X, a is the symbol for the ____.

Answer 29

a = y-int of regression line

Question 30

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

Answer 30

120

Question 31

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

Answer 31

S

Question 32

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 32

inferential stats

Question 33

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

Answer 33

marginal tabulation

Question 34

In the regression equation, Y = a +  X ,  is the ____.

Answer 34

B is the slope of the line

Question 35

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

Answer 35

u1 + u2 = 0

Question 36

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 36

.37

Question 37

look at x^2 test

Question 38

The midpoint of a set of numbers is referred to as the _____.

Answer 38

median

Question 39

________ statistics allow inferences about a whole population from a sample.

Answer 39

inferential

Question 40

________ is the long-run relative frequency with which an event will occur.

Answer 40

probability

Question 41

_______ is the distance between the smallest and the largest values of a frequency distribution.

Answer 41

range

Question 42

________ is a graphical way of showing the frequency distribution in which the height of a bar corresponds to the frequency of a category.

Answer 42

histogram

Question 42

_______ statistical analysis tests hypotheses involving two variables.

Answer 42

bivariante

Question 43

6. Type ___ error occurs when a condition that is really true in the population is rejected based on statistical observations.

Answer 43

one

Question 44

7. Type ____ error occurs when a condition that is not true in the population is accepted based on statistical observations.

Answer 44

two

Question 44

______ test involves comparing the observed frequencies with the expected frequencies in each cell of the table.

Answer 44

CHi-Square

Question 45

9. ANOVA stands for ______

Answer 45

Analysis of Variance.