Using R :
Load the following CSV file to your R environment :
http://www.math.smith.edu/sasr/datasets/help.csv
Using the above file perform the following,
• Create a dataframe of: id, pcs1, mcs1, substance, and race group
• Calculate: Mean, Max, STD, Max, Min of mcs1
• Create a frequency table of substance vs. racegroup
• Substitute the missing values of mcs1 by the overall average
