Author Question: A Pearson correlation of r = -0.25 indicates that a graph of the data would show points ____. a. ... (Read 113 times)

tfester · **on:** Jun 19, 2018

A Pearson correlation of r = -0.25 indicates that a graph of the data would show points ____.

a. clustered close to a line that slopes up to the right
b. clustered close to a line that slopes down to the right
c. widely scattered around a line that slopes up to the right
d. widely scattered around a line that slopes down to the right

Question 2

A double pretest design is particularly attractive when ____.

a. the researcher is evaluating a program that has already begun
b. the unit of study is a community rather than an individual
c. it is important that those who most need the treatment receive it
d. there are concerns about selection-maturation effects