Homework Help: STATISTICS(NEED HELP PLEASE?)

Posted by Kim on Wednesday, July 25, 2012 at 3:00pm.

Consider the following set of data.
(25, 6), (25, 51), (62, 34), (84, 15), (112, 57), (122, 14)

(a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.)
40.17

(b) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal places.)
sx =

sy =

STATISTICS(Partial) - PsyDAG, Thursday, July 26, 2012 at 2:41pm
I can't help with the covariance, but here is they way to find the standard deviations.

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

I'll let you do the calculations.

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