A: Data Analysis $-$ Simple Regression $($Data Cleaning Required$)$

$1.$ The attached excel file includes the raw data $($which has not been reviewed for errors$).$ A second tab includes graphs that provide a visual analysis of each of the possible cost drivers against total operating cost. Review the results to determine if there are any outliers that should be corrected. It is noted that the intern has been known to have made mistakes in data entry before by entering double zeroes on accident. Also, there are no other known errors or outliers that should have occurred. Using the graphs, determine if there are any situations where this has occurred.

If any errors are discovered, they should be corrected $($not deleted$),$ and you should use the cleaned$-$up data file for the remainder of this assignment.

Part $2$ Cost Driver Analysis $($uncleaned data with graphs$).$xlsx

$2.$ Using the cleaned data, prepare a correlation matrix showing the relationship among all of the variables.

a$-1.$ Which variable has the strongest correlation with total operating cost?