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 =
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.