# Quiz 16: Testing for Association: Pearsons R and Regression

Criminal Justice

Q 1Q 1

Pearson's r is designed for data measured at the
A)nominal level
B)ordinal level
C)interval level
D)metric ordinal level

Free

Multiple Choice

C

Q 2Q 2

The type of relationship measured by Pearson's r is
A)exponential
B)uniform
C)linear
D)curvilinear

Free

Multiple Choice

C

Q 3Q 3

The most important advantage of using Pearson's r is that
A)it can be interpreted as a direct-PRE measure
B)it is the only statistic that has multivariate capabilities
C)the measure itself has very few assumptions about data
D)it is sensitive to the magnitude of change between pairs of scores

Free

Multiple Choice

D

Q 4Q 4

If you calculated a Pearson's r-square of .36 between median incomes and city crime rates it means that:
A)36 percent of the variance in city crime rates is explained
B)60 percent of the variance in city crime rates is explained
C)6 percent of the variance in median incomes is explained
D)13 percent of the variance in either median incomes or city crime rates is explained

Free

Multiple Choice

Q 5Q 5

Pearson's r can easily be extended to a multivariate statistical technique
A)with multiple independent variables
B)with multiple dependent variables
C)with the restriction that only one control variable can be used
D)all of the above

Free

Multiple Choice

Q 6Q 6

Assumptions of Pearson's r include which of the following?
A)normally distributed data
B)homoscedasticity
C)the residual variance in uncorrelated with the independent variable
D)all of the above

Free

Multiple Choice

Q 7Q 7

If Pearson's r = .50 and N = 20,then the proportion of explained variance is:
A).50
B)20
C)10
D).25

Free

Multiple Choice

Q 8Q 8

The linear function,Y = a + bx,is used to estimate the actual amount of effect variable X will have on variable Y
A)under the condition that X = 2Y
B)under the condition that Y = 2X
C)for each unit increase in Y
D)for each unit increase in X

Free

Multiple Choice

Q 9Q 9

If you wanted to know the amount of change in Y as a produce of X,you would be interested in
A)the correlation coefficient or r
B)the coefficient of nondetermination or c
C)the standardized coefficient or s
D)the regression coefficient or b

Free

Multiple Choice

Q 10Q 10

In order to assess the results of a prediction using Pearson's r,you would need
A)both the correlation coefficient and the regression coefficient
B)both b and Beta
C)only r
D)none of the above

Free

Multiple Choice

Q 11Q 11

Given the formula Y = a + bX,if the Pearson's r value is .60 the value of b would have to be:
A)half of .60 or .30
B)60
C).36
D)none of the above

Free

Multiple Choice

Free

True False

Q 13Q 13

Pearson's r will provide both symmetric and asymmetric relationship values,but you have to know which one to use.

Free

True False

Q 14Q 14

The correlation value for Pearson's r does not reach 1.0 (unity)but will after you square it.

Free

True False

Q 15Q 15

An r-squared value of .40 means that the independent variable has accounted for 16% of the variance in the dependent variable.

Free

True False

Free

True False

Q 17Q 17

If the correlation value for Pearson's r is positive,an asymmetric version of the test has been used.

Free

True False

Q 18Q 18

It is possible to have both a high correlation coefficient and a low regression coefficient.

Free

True False

Free

True False

Free

True False

Q 21Q 21

An alternative to regression,when assumptions are severely violated,is the Contingency Coefficient statistic.

Free

True False