a correlation coefficient is 0.80 and the number of observation is 62. What is the calculated test statistics? is this significant correlation using 5% level of significance?

.

step-by-step explanation:

.

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

answer: the correct option is d.

explanation:

it is given that the triangle j'k'l' shown on the grid below is a dilation of triangle jkl using the origin as the center of dilation.

from the given graph it is noticed that k(4,8) and k'(2,4). let origin is defined by o and scale factor is defined by k, then

    (1)

distance formula,

put these values in equation (1).

therefore scale factor is     and option d is correct.