Module 8
Module 8 Homework Assignment
Managers rate employees according to job performance and attitude. The results for several
randomly selected employees are given below.
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Order Paper NowPerformance 59 63 65 69 58 77 76 69 70 64
Attitude 72 67 78 82 75 87 92 83 87 78
1. Construct a scatterplot of the data. Does it show a positive correlation, negative correlation or no correlation?
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2. Find the value of the linear correlation coefficient r.
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3. Find the critical values for a = 0.05.
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4. Is there sufficient evidence to conclude that there is linear correlation between job performance and attitude? Show why or why not.
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5. Find the value of r2 and explain its meaning.
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