A study was made to see whether a correlation existed between students' grades in a course and students' rankings of the professor's teaching.* The results of this survey are shown in Table 14.13. Use these results to formulate a conclusion. Remove the last data point from the table (class no. 47). This was a class that gave the professor's teaching a low rating, and the students' grades were also very low. Does this change your conclusion? Elaborate on your answer.

Table 14.13

Transcribed Image Text:

Student Class Rank 1 2 3 4 5 6 7 CO O 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Student Teacher Class Grade Rating Rank 3.19 1.00 3.58 1.06 3.89 1.17 2.50 1.30 3.11 1.38 2.81 1.39 3.73 1.40 3.06 1.43 3.55 1.44 3.63 1.50 3.71 1.55 2.00 1.56 3.19 1.60 3.23 1.70 3.38 1.70 3.21 1.79 3.25 1.82 1.83 1.85 2.00 2.00 2.00 2.07 2.63 3.27 2.58 3.13 3.19 3.46 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Grade 3.00 2.68 2.36 3.35 3.27 3.11 3.18 3.16 2.83 3.05 3.61 2.92 3.17 2.18 3.14 3.55 2.69 2.55 3.08 3.00 3.67 3.67 2.95 1.68 Teacher Rating 2.10 2.22 2.25 1.00 1.00 1.13 1.27 1.31 1.33 1.50 1.50 1.53 1.58 1.58 1.73 1.80 1.82 1.90 1.91 1.92 2.20 2.27 2.60 2.80