Math 227 - Statistics » Spring 2023 » 19P Scatterplots, Correlation, and Regression

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Question #1
Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Performance (x) / 6 / 1 / 2 / 8 / 4 / 4 / 7 / 2 / 5 / 7 Attitude (y) / 6 / 10 / 10 / 9 / 4 / 9 / 4 / 4 / 8 / 8 Use the given data to find the linear correlation coefficient. (Round your answer to nearest thousandth.)
A.   -0.15
B.   -0.19
C.   -0.17
D.   -0.13
Question #2
Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Performance (x) / 6 / 6 / 4 / 3 / 6 / 3 / 9 / 7 / 3 / 2 Attitude (y) / 2 / 2 / 10 / 7 / 10 / 8 / 6 / 3 / 7 / 3 Use the given data to find the test statistic for testing linear correlation. (Round your answer to nearest thousandth.)
A.   -0.669
B.   -0.613
C.   -0.699
D.   -0.609

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