Use the following data to answer Questions 1a and 1b.
|
Total no. of problems correct (out of a possible 20)
|
Attitude toward test taking (out of a possible 100)
|
|
17
|
94
|
|
13
|
73
|
|
12
|
59
|
|
15
|
80
|
|
16
|
93
|
|
14
|
85
|
|
16
|
66
|
|
16
|
79
|
|
18
|
77
|
|
19
|
91
|
a. Compute the Pearson product-moment correlation coefficient by hand and show all your work.
b. Construct a scatterplot for these 10 values by hand. Based on the scatterplot, would you predict the correlation to be direct or indirect? Why?