2.2 is scaling necessary for PEA in this case? Give justication and perform scaling. Solution: Yes, it is necessary:r to perform scaling for PICA. For instance. in given data set. applications and other variables are having vaiues in thousands and few variables such as percentile is in just two digits. So, the data in these variables are of different scaies, it is tough to compare these variables. The PICA calculates a new projection of the given data set and the new axis are based on the standard deviation of the variables. So a variable with a high standard deviation in the data set will have a higher weight for the calculation of axis than a variable with a low standard deviation. Bv performing scaling, we can easilvr compare these variables