Internet and Computer Exercise 1 (From Marketing Research (6th Edition) ,Page 600: Chapter 18, Internet Exercise 1)- Conduct a two-group discriminant analysis on the data given in Tables 18.2 and 18.3 using SPSS (SAS and Minitab not needed). Compare the output and discuss similarities and differences. The comparison is about the similarities and differences in
a) the significance values of the discriminant coefficients,
b) percentage of original grouped cases correctly classified, and
c) percentage of cross-validated grouped cases correctly classified across the three datasets

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to