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Compute the sample covariance

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The following is a set of data from a sample of n=11 items. Complete parts? (a) through left parenthesis (c).

X           48         42         36         6           57         21         24         54             39         45         9

Y           16         14         12         2           19         7           8           18             13         15         3

a. Compute the sample covariance. ?(Round to three decimal places as? needed.)

b. Compute the coefficient of correlation. (Do not round until the final answer. Then round to three decimal places as? needed.)

c. How strong is the relationship between X and? Y? Explain.

A. X and Y have no correlation.

B. X and Y have a strong positive correlation because as X? increases, Y tends to increase also.

C. X and Y have a perfect negative correlation because all points fall on a straight line with a negative slope.

D. X and Y have a perfect positive correlation because all points fall on a straight line with a positive slope.

Reference no: EM132372737

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