Question 6
A regression line can be used to
determine the strength of a relationship.
determine if there is a cause and effect relationship.
predict Y for any X value.
establish if a relationship is linear.
Question 7
If the correlation coefficient R between two variables is ,it is expected that the slope of the regression line will be
positive; positive
positive; large
negative; small
positive; negative
Question 8
If the slope of the simple regression line is .12, then the Pearson correlation coefficient r is expected to be
positive
negative
small
large
Homework Answers
6. The correct answer is Option C. A regression line can be used to predict the value of Y from X.
7. The correct answer is Option A. If the correlation is positive, we can expect the regression slope to be positive as well.
8. The correct answer is Option A. The Pearson correlation is expected to be positive.
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