
Decide whether the following statement is true or false.
A negative linear correlation will be modelled by a line with a negative gradient.

Important Questions on Statistics
The following results were obtained with respect to two variables and :
Find the regression equation of on .




The following results were obtained with respect to two variables and :
Find the regression coefficient





Find the equation of the regression line of on , if the observations are as follows:
.
Also, find the estimated value of when .


Find the line of regression of on from the following table.
Hence, estimate the value of when .



Find the regression coefficients and correlation coefficient for the following data:


A manufacturer of optical lenses has the following data on the cost per unit (in Rs.) of a certain quality of lens and the number of units made in each order:
Order Number | Number of units () | Cost per unit () |
Find the correlation coefficient. Also determine the two regression equations.


The lines of regression in a bivariate distribution are Find the regression coefficients.

The lines of regression in a bivariate distribution are Find Coefficient of correlation.

