Question

the choices for the final blank are "not change" "increase" or "decrease". please help. thank you :)

Complete: Chapter 14 Problem Set more. 6. Calculating the Pearson correlation with z-scores Aa Aa E Imagine that a professor of psychology has two teaching assistants (TAS) who will help him grade assignments for the duration of the semester. The professor wants to make sure that he and the TAs are well calibrated with one another, so he has all three of them grade the first assignment independently. Because the professor grades every assignment on a curve, he first converts the students' scores to Z-scores for each grader. The following table shows the Z-scores for population of 10 students in his class for each grader. Student 1 Student 2 Student 3 Student 4 Student 5 Student 6 Teaching Teaching Professor Assistant #1 Assistant #2 1.27 1.27 0.63 -1.63 -0.60 0.85 -0.12 0.38 -0.94 0.88 0.78 2.20 -1.03 -1.27 -0.51 0.32 0.11 0.45 -1.46 -2.17 -0.99 1.14 0.83 0.02 0.47 -0.51 0.06 0.20 - 1.21 Student 7 Student 8 Student 9 Student 10 0.58 d The professor is going to use the Z-scores to calculate the Pearson correlation coefficient between his scores and those of his TAs. To calculate the Pearson correlation coefficient, he sums the products of the zoscores. The professor should divide this sum by The professor constructed a table of correlation coefficients between his scores and those of his TAS. Select the

Answer 1

10

0.90

Option A

not change

1.27	1.27
-1.63	-0.6
-0.12	0.38
0.88	0.78
-1.03	-1.27
0.32	0.11
-1.46	-2.17
1.14	0.83
0.58	0.47
0.06	0.2
0.897289