ii.Z-score normalization

iii.Normalization by decimal scaling.

d.(2 points) Draw a scatter-plot based on the two variables and interpret the relationship between thetwo variables.

e.(2 points) Calculate the correlation matrix. Are these two attributes positively or negativelycorrelated? Calculate the covariance matrix. How is the correlation matrix different from thecovariance matrix?

DSC 441: Fall 2018-2019 Assignment 2, Page 4 of 7

Problem 2 (5 points): This problem is an example of data preprocessing needed in a data mining process. Suppose a group of 12 sales price records has been sorted as follows: 8, 13, 14, 15, 17, 37, 55, 60, 77, 95, 208, 218Partition them into bins by each of the following method, smooth the data and interpret the results:a.(2.5 points) equal-depth partitioning with 4 values per binN=12 12/4 = 3; meaning each bin will have 4 values Bin 1: 8, 13, 14, 15Bin 2: 17, 37, 55, 60Bin 3: 77, 95, 208, 218Smoothing by Bin means:Bin 1: 12.5, 12.5, 12.5, 12.5Bin 2: 42.25, 42.25, 42.25, 42.25Bin 3: 149.5, 149.5, 149.5, 149.5When using the equal-depth method, each bin will have equal sample sizes.b.(2.5 points) equal-width partitioning with 4 bins

DSC 441: Fall 2018-2019 Assignment 2, Page 5 of 7