Calculate correlation of the following data using Karl Pearson's method:

Calculate cofficient of correlation of the following data :

Find the mean of the following data using deviation method :

Find the mean of the following data using deviation method :

Calculate National income using the following data :

Calculate cofficient of correlation of the following data with rank difference and Karl Pearson's method:

Calculate cofficient of correlation of the age of husband and wife using Karl Person's method.

Calculate the AM of the following data using short-cut method .

Calculate standard deviation of the following data,using step-deviation method.