1.Conduct principal component analysis on all variables except the Name variable. Should you standardize the data? Explain. 2. What percentage of total variability is accounted for by the first principal component? How many principal components must be retained in order to account for at least 80% of the total variance in the data? 3. Which original variables are given the highest weight to compute the first principal component? Which original variable is given the highest weight to compute the second principal component? 4. What is the principal component 1 score for the first record (3M)?

Principal Components Explained Variance Principal Components Explained Variance