While calculating correlation coefficient between two variables x and y for 30 pairs of observation, the students observed the following results:
`Sigmax=135,Sigmax^(2)=680,Sigmay=110,Sigmay^(2)=485andSigmaxy=530`
On rechecking, it was found that he had wrongly copied one pir as `(5,8)` whereas value is `(7,9)` calculate the correct correlation coefficient between x and y.

Calculate the coefficient of correlation between two variables x and y for 12 pairs of observation, the following data was obtained. Sigmax=20,Sigmay=6,Sigmax^(2)=650,Sigmay^(2)=280,Sigmaxy=330 On rechecking, it was found that one pair (12,8) was wrongly copied while the correct pair being (9,13) . find the correct value of coefficient of correlation.

A computer while calculating the correlation coefficient between the variables x and y obtained the following results : n=25,sumx_(i)=125,sumy_(i)=100,sumx_(i)^(2)=650,sumy_(i)^(2)=460,sumx_(i)y_(i)=508 It was however later discovered at the time of checking that it has copied down two pairs of obervations as (6,14) and (8,6) where as values were (8,12) and (6,8) .Calculate the correct correlation coefficient of x and y.

If for 5 observations of pairs (x,y), Sigmax=15,Sigmay=25,Sigmay^(2)=135 and Sigmaxy=83 , then the value of b_(xy) is

In an experiment with 9 observation on x , the following results are available Sigmax^(2)=360 and Sigma x=34 . One observation that was 8, was found to be wrong and was replaced by the correct value 10, then the corrected variance is

In an experiment with 10 observations on x the following results are available Sigmax^(2)=354 and Sigma x=58 . If one observation 8 that was found to be wrong and was replaced by the corrected value 10, then the corrected variance is

The two lines of regressions are 4x + 2y - 3 =0 and 3x + 6y +5 =0 . Find the correlation coefficient between x and y .

x and y are a pair of correlated variables . Ten observations of their values (x_(p)y_(t)) have the following result : sum x = 55, sum y = 55, sum x^(2) = 385, sum xy = 350 . Predict the value of y when the value of x is 6

Calculate Kari Pearson's coefficient of correlation between the values of x and y for the following data : n = 10, sum x = 55, sum y = 40, sum x^(2) = 385, sum y^(2) = 192 and sum (x + y)^(2) = 947

The following results were obtained with respect to two variables x and y. Sigmax=15,Sigmay=25,Sigmaxy=83,Sigmax^(2)=55,Sigmay^(2)=135and n= 5 (i) Find the regression coefficient b_(xy) . (ii) Find the regrassion equation of x on y.