Carefully review the slides in pages 22 ~ 39 of W7(Period2), and do the followings in Radiant and create a report in a word document

 1. Visualization

Obtain scatter plots of Sales vs. Price, and Sales vs. Ads, and explain the relationship from your visual inspection of data

Obtain bar plots of Sales by Thanksgiving and Christmas, and explain and interpret the differences

 2. Effects of control variables

Regress Sales on Price, then interpret the coefficient

Regress Sales on Price, Thanksgiving, then explain how coefficient changes

Regress Sales on Price, Thanksgiving, Christmas then explain how coefficient changes

Repeat this for Ad Spend instead of Price

 3. Regression analysis

Regress Sales on Price, Ad Spend, Thanksgiving, and Christmas

Interpret all four coefficients

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