Question: Split the data set into a number of subsets based on Department. How many subsets are created? Which subset contains missing values? How many missing

Split the data set into a number of subsets based on Department. How many subsets are created?
Which subset contains missing values?
How many missing values are in that data set?
Use the imputation strategy to replace the missing values with the mean of the variable. What is the average hourly rate for each subset?

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