solution

Given the following sets of paired sample scores:

Save your time - order a paper!

Get your paper written from scratch within the tight deadline. Our service is a reliable solution to all your troubles. Place an order on any task and we will take care of it. You won’t have to worry about the quality and deadlines

Order Paper Now

a. Use the equation

to compute the value of Pearson r for each set. Note that in set B, where the correlation is lowest, some of the X Y values are positive and some are negative. These tend to cancel each other, causing r to have a low magnitude. However, in both sets A and C, all the products have the same sign, causing r to be large in magnitude. When the paired scores occupy the same or opposite positions within their own distributions, theX Y products have the same sign, resulting in high magnitudes for r.

b. Compute r for set B, using the raw score equation. Which do you prefer: using the raw score or the  score equation?

c. Add the constant 5 to t he X scores i n set A and compute r again, using t he r aw score equation. Has the value changed?

d. Multiply the X scores in set A by 5 and compute r again. Has the value changed?

e. Generalize the results obtained in parts c and d to subtracting and dividing the scores by a constant. What does this tell you about r?

 
"Looking for a Similar Assignment? Get Expert Help at an Amazing Discount!"