statistics

Managers rate employees according to job performance and attitude. The results for several

randomly selected employees are given below.

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Performance ?????? 59???? 63???? 65???? 69???? 58???? 77???? 76???? 69???? 70???? 64

Attitude???? ?????????????????????? 72???? 67???? 78???? 82???? 75???? 87???? 92???? 83???? 87???? 78

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1.?? Construct and show 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.?? 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.

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

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