Correlation & Regression

Correlation: 

For n pairs of values , the correlation coefficient can be calculated by one of the following formulae

I recommend the following formula, because it is less affected by rounding errors and require less number of columns

=

Regression:

Regression equation of y on x

For n pairs of values , the Regression coefficient can be calculated by one of the following formulae

I recommend the following formula, because it is less affected by rounding errors and require less number of columns

if   and  then 

After calculating values of regression coefficients a and b, use one of the following equations to obtain regression equation of y on x

For Regression equation of x on y

For n pairs of values , the Regression coefficient can be calculated by one of the following formulae

I recommend the following formula, because it is less affected by rounding errors and require less number of columns

if   and  then 

After calculating values of regression coefficients a and b, use one of the following equations to obtain regression equation of y on x

Computer Coaching Classes

 Professor Zahoor Ahmad

from

F.G. Sir Syed College,

The Mall, Rawalpindi

is taking

Computer Science Classes

for Matric, O/A Level, ICS

C/C++ Language

at

Sir Syed Educational Academy

1/5, Lane # 3, Tulsa Road,

Lalazar, Rawalpindi Cantt.

Call: 0300 5100 970