Question

True or False?
When doing linear regression, if the correlation coefficient is positive, the slope of the line is positive.

Answer 1

TRUE?

Answer 2

@mathstudent55

Answer 3

@amistre64

Answer 4

is it true?

Answer 5

does the corr.coeff. define the slope of the regression line?

Answer 6

all this does is relate to definitions ..... how does you material define it?

Answer 7

wait what

Answer 8

you are asking a question about definitions ... so, how does your material define it?

Answer 9

notes says:

A linear regression line has an equation of the form Y = a + bX, where X is the explanatory variable and Y is the dependent variable. The slope of the line is b, and a is the intercept (the value of y when x = 0).
- If there appears to be no association between the proposed explanatory and dependent variables (i.e., the scatterplot does not indicate any increasing or decreasing trends), then fitting a linear regression model to the data probably will not provide a useful model. A valuable numerical measure of association between two variables is the correlation coefficient, which is a value between -1 and 1 indicating the strength of the association of the observed data for the two variables.

Answer 10

that reads to me like there is a good relationship between the correlation coeff, and the slope of the regression line.

so id agree with "true"

Answer 11

yea, ok. thanks

Answer 12

yw