Question #55140

In a partially destroyed laboratory, record of an analysis of correlation of data,

only the following results are legible:

Variance of X = 9

Regression equations are

(i) 8x −10y + 66 = 0

(ii) 40x −18y − 214 = 0

Find out the following missing results.

(i) The means of X and Y

(ii) The coefficient of correlation between x and y

(iii) The standard deviation of Y

only the following results are legible:

Variance of X = 9

Regression equations are

(i) 8x −10y + 66 = 0

(ii) 40x −18y − 214 = 0

Find out the following missing results.

(i) The means of X and Y

(ii) The coefficient of correlation between x and y

(iii) The standard deviation of Y

Expert's answer

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