You have weekly store-level data for 156 weeks (t) over 700 stores (s) on unit sales for a brand and a binary variable indicating if that particular brand was on display in that particular store in that particular week. You use a pivot table to organize the data and get the following summary. Imagine that you estimate a linear regression model using that weekly store-level data having the following form: unitsalesst=0+1displaystunitsalesst=0+1displayst . What will the estimate for 11be in that model?

Display	Average of Unit Sales
0	226
1	477
Grand Mean	320

Group of answer choices

226

251

320

477

not enough information