Deck 16: Advanced Correlational Techniques: Regression Analysis

Question 1

The best-fitting straight line drawn through the center of a scatterplot is the:

A) regression coefficient.
B) Pearson coefficient.
C) regression line.
D) coefficient of determination.

Answer 1

regression line.

Question 2

The formula to determine a regression line is:

A) Y' = bX + a.
B) Y' = aX + b.
C) X' = bY' + a.
D) a' = bX + Y.

Answer 2

Y' = bX + a.

Question 3

In the formula for a regression line, which symbol represents the slope?

A) Y'
B) a
C) b
D) X

Answer 3

b

Question 4

In the formula for a regression line, which symbol represents the y-intercept?

A) Y'
B) a
C) b
D) X

Question 5

The formula for calculating the slope for a regression line is:

A) r[ $\sigma$ _x / $\sigma$ _y].
B) r[ $\sigma$ _y / $\sigma$ _x].
C) r[z_y / z_x].
D) r[z_x / z_y].

Question 6

The formula for calculating the y-intercept for a regression line is:

A) $\bar{Y}-b(\bar{X})$
B) $\bar{X}-b(\bar{Y})$
C) $\bar{Y}-a(\bar{X})$
D) $\bar{X}-\alpha(\bar{Y})$

Question 7

If x = 25, predict y, given the following regression equation: y' = 17 + .56x.

A) 21
B) 31
C) 51
D) 61

Question 8

If x = 20, predict y, given the following regression equation: y' = 12 + .25x.

A) 17
B) 29
C) 21
D) 34

Question 9

When we use multiple predictor variables, we are using a _____ analysis, which is analogous to the _____.

A) multiple regression; one-way ANOVA
B) simple regression; one-way ANOVA
C) multiple regression; two-way ANOVA
D) simple regression; two-way ANOVA