5. Calculating the Pearson correlation with z scores Aa Aa duration of the semes

Question

5. Calculating the Pearson correlation with z scores Aa Aa duration of the semester. The professor wants to make sure that she and the TAs are well calibrated with one another, so she has all three of them grade the first assignmentindependently. Because the professor grades every assignment on a curve, she first converts the students' scores to z scores each grader. The following table shows for the z-scores for population of 10 students in her class for each grader Teaching Teaching Professor Assistant #1 Assistant a2 Student 1 0.40 1.01 Student 2 0.88 1.70 -0.61 Student 3 -0.94 0.30 0.34 Student 4 2.26 0.88 0.72 Student 5 0.49 1.08 1.26 Student 6 0.48 0.30 0.08 Student 7 -0.94 1.52 2.11 Student 8 1.15 0.77 Student 9 -0,49 0.57 0.46 Student 10 1.21 0.08 0.16 The professor is going to use the z-scores to calculate the Pearson correlation between her scores and those of her TAs To calculate the Pearson correlation, she sums the products of the z-scores. The professor should divide this The professor constructed a table of Pearson correlations between her scores and those her TAs, Select the correct of

Explanation / Answer

Pearsons correlation between Teaching Assistant #1 and Professsor is 0.24

The two TAs are well calibrated with each other but not with the professor.

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