To make the data analysis statistically sound, various statistical techniques such as percentage, arithmetic mean and weighted arithmetic mean have been used.

It shows that a majority of the library professionals are well conversant with MS- Windows followed by MS-DOS and Linux as per the weighted arithmetic mean (WAM) values 39.

The analysis of data reveals that majority of the LIS professionals have knowledge of HTML, followed by C++, XML and Java which is also evident from the value of weighted arithmetic mean.

It is also evident from the weighted arithmetic mean value.

In the IPLV formula, the weighted arithmetic mean equation is used for calculating the IPLV value from four measured COPs at loads of 100%, 75%, 50%, and 25%, as shown in Equation 1.

six], which is the weighted arithmetic mean given by Equation 5 using the same weights and COPs as the CSE equation.

This result shows that the weighted arithmetic mean equation is overestimated when at least one COP is considerably lower than the other COPs.

The use of the weighted harmonic mean equation improves the accuracy in predicting the SCOP as compared with the weighted arithmetic mean equation adopted by the IPLV equation.

The revised regulations eliminated the

weighted arithmetic mean as an acceptable method of computing the IPI for a dollar-value pool (even if the taxpayer elects the 10% method and uses a

weighted arithmetic mean to compute the category inflation index).