Rank Correlation

In a partially destroyed laboratory record of an analysis of regression data, the following data are legible : 

Variable of X = 9 

Regression equations : 8x - 10g + 66 = 0 and 40x- 18g = 214

Find Mean values of X and Y on the basis of the above information .

Define correlation.

If the sum of squares of differences of ranks for 10 pairs of observations is 66, find the rank correlation coefficient.

Compute the coefficient of correlation for the following data : 

n = 100 ; `bar x` = 62 , ` bar y` = 53 . σx = 10 ; σ y = 12 ,

`sum ("x"_1 - bar x) ("y"_1 - bar y) = 8000`

In a partially destroyed laboratory record of an analysis of regression data, the following data are legible : 

Variable of X = 9 

Regression equations : 8x - 10g + 66 = 0 and  40x- 18g = 214

Find Correlation coefficient between X and Y on the basis of the above information.

A random sample of recent repair jobs was selected and estimated cost, actual cost were recorded.

Calculate the value of spearman’s correlation.

The following are the ranks obtained by 10 students in commerce and accountancy are given below:

To what extent is the knowledge of students in the two subjects related?

Coefficient of rank correlation between x and y is 0.5 and `sumd_i^2`= 42. Assuming that no ranks are repeated, find the number of pairs of observations.