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Find the value of the linear correlation coefficient r

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Assignment

Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below.

Performance     59  63  65  69  58  77  76  69  70  64
Attitude           72  67  78  82  75  87  92  83  87  78

1. Construct and show a scatterplot of the data. Does it show a positive correlation, negative correlation or no correlation?

2. Find the value of the linear correlation coefficient r.

3. Find the critical values for α = 0.05.

4.Based on the critical value and the correlation coefficient, is there sufficient evidence to conclude that there is linear correlation between job performance and attitude? Explain why or why not.

5. Find the value of r2 and explain its meaning.

Reference no: EM131505672

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