Deck 17: Bivariate Correlation and Regression

Question 1

If the y-intercept is 2.34 and the slope of the line is 6.23,what is the regression function
For these data?

A)Y = 6.23 + 2.34 X
B)Y = 2.34 + 6.23 X
C)Y = 6.23 ─ 2.34 X
D)Y = 2.34 ─ 6.23 X
E)Y = 2.34 + 2.34 X

Answer 1

B

Question 2

If the relationship between a predictor variable and a criterion variable is strong,the
predictor variable can be used to estimate the criterion variable using regression analysis.

Answer 2

True

Question 3

When the data describing the association between two variables are used to create a
Straight-line through the data points such that this line summarizes the relationship between these variables,this is called a(n):

A)multiple regression procedure.
B)ANOVA procedure.
C)chi-square procedure.
D)least-squares procedure.
E)two-group t-test procedure.

Answer 3

D

Question 4

In regression,the statistic that measures the percentage of total variation in Y that is
"explained" buy the variation in X is known as the:

A)correlation coefficient.
B)slope of the line.
C)the value for t.
D)coefficient of determination.
E)y-intercept.

Question 5

When two variables are involved in a research study,the appropriate statistical tests are
Called:

A)univariate techniques.
B)spurious techniques.
C)multivariate techniques.
D)one-dimensional techniques
E)bivariate techniques.

Question 6

The correlation coefficient can range from ________ to ________ .

A)zero;plus two
B)minus one;plus one
C)minus two;plus two
D)minus one;zero
E)zero;plus one

Question 7

Least-squares regression produces a straight line that "fits" the data in the scatter plot
better than any other possible line.

Question 8

The coefficient of determination ranges between ________ and ________ .

A)minus one;plus one
B)zero;one
C)minus one;zero
D)minus two;plus two
E)one;plus one

Question 9

In regression analysis,the unexplained variation is a measure of the scatter around the
regression line.

Question 10

In a scatter diagram,the ________ variable is plotted on the x-axis,while the ________
Variable is plotted on the y-axis.

A)criterion;independent
B)dependent;independent
C)predictor;independent
D)independent;dependent
E)criterion;predictor

Question 11

If bivariate regression,if the mean for Y is 512,the mean for X is 230,and the slope is
2)35,what is the approximate value of the y-intercept?

A)─33.6
B)+ 28.5
C)─ 13.8
D)+ 40.5
E)─ 28.5

Question 12

The coefficient of determination equals the explained variation ________ the total
Variation.

A)minus
B)times
C)divided by
D)squared;times
E)plus

Question 13

When more than two variables are involved in a research study,the appropriate statistical
Tests are called:

A)univariate techniques.
B)spurious techniques.
C)multivariate techniques.
D)one-dimensional techniques
E)bivariate techniques.

Question 14

In regression,R squared is known as the:

A)coefficient of determination.
B)the correlation coefficient.
C)slope of the line.
D)the value for Z.
E)y-intercept.

Question 15

When the degree of association between two variables is studied,the independent
Variable is called the:

A)concomitant variable.
B)predictor variable.
C)y-axis variable.
D)multi-dimensional variable.
E)criterion variable.

Question 16

When the degree of association between two variables is studied,the dependent
Variable is called the:

A)concomitant variable.
B)predictor variable.
C)x-axis variable.
D)multi-dimensional variable.
E)criterion variable.

Question 17

Bivariate correlation can be used to prove that one variable caused the change in another
variable.

Question 18

The degree to which changes in one variable are associated with changes in another
Variable is known as:

A)chi-square.
B)ANOVA.
C)the dependent variable.
D)the independent variable.
E)correlation.

Question 19

In the regression equation: Y = a + b X,a is the ________ ,while b is the ________ .

A)y-intercept;slope
B)predictor;criterion
C)criterion;predictor
D)slope;y-intercept
E)independent variable;dependent variable

Question 20

The correlation coefficient is the square root of the coefficient of determination.