What does the correlation coefficient of -0.975 on a linear regression indicate? a)One variable has a strong relationship with the other.
b)One variable causes the other.
c)The slope is positive.
d)The scatterplot shows no association of the variables.

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)

4percent of a number is what fraction of that number? ? i really need asap

The coordinates of one point of a line segment ate (-2,-7). the line segment is 12 units long. give three possible coordinates of the line segment’s other end point.