1.

Q.

Estimate the correlation coefficient for this scatterplot

a. r = 0

b. r = 1.2

c. r = 0.89

d. r = -0.89

2.State the correlation between number of days absent from school and mathematics marks

a. Negative Correlation

b. Positive Correlation

c. No Correlation

3.In simple linear regression analysis, which of the following is NOT true?

a.TheFtest and thettest yield the same results.

b.The value ofF=t2.

c.The relationship betweenxandyis represented by means of a straight line.

d.TheFtest and thettest may or may not yield the same results.

4.In a simple regression analysis (whereyis a dependent andxan independent variable), ifthe slope is positive, then it must be true that _____.

a.there is a negative correlation betweenxandy

b.they-intercept is 0

c.there is no correlation betweenxandy

d.there is a positive correlation betweenxandy

5.In a simple linear regression analysis, the correlation coefficient (r) and the slope (m) __________ have the same sign.

a. never

b. always

c. might

d. sometimes