Consider the demand for Fresh Detergent in a future sales period when Enterprise Industries' price for Fresh will bex₁= 3.70, the average price of competitors' similar detergents will bex₂= 3.90, and Enterprise Industries' advertising expenditure for Fresh will bex₃= 6.50. A 95 percent prediction interval for this demand is given on the following JMP output:

Predicted Lower 95% Upper 95% StdErr Lower 95% Upper 95% Demand Mean Demand Mean Demand Indiv DemandIndiv DemandIndiv Demand 318 . 41065034778 . 31431728228 . 5069834132 0.23930331037. 91875534878 . 9025453468 Click here for the Excel Data File Price IndPrice PriceDif AdvExp Demand X1 X2 X4 X3 Y 3.85 3.80 -0.05 5.50 7.38 3.75 4.00 0.25 6.75 8.51 3.70 4.30 0.60 7.25 9.52 3.70 3.70 0.00 5.50 7.50 3.60 3.85 0.25 7.00 9.33 3.60 3.80 0.20 6.50 8.28 3.60 3.75 0. 15 6.75 8.75 3.80 3.85 0.05 5.25 7.87 3.80 3.65 -0.15 5.25 7.10 3.85 4.00 0.15 6.00 8.00 3.90 4. 10 0.20 6.50 7.89 3.90 4.00 0.10 6.25 8.15 3.70 4.10 0.40 7.00 9.10 3.75 4.20 0.45 6.90 8.86 3.75 4. 10 0.35 6.80 8.90 3.80 4.10 0.30 6.80 8.87 3.70 4.20 0.50 7.10 9.26 3.80 4.30 0.50 7.00 9.00 3.70 4.10 0.40 6.80 8.75 3.80 3.75 -0.05 6.50 7.95 3.80 3.75 -0.05 6.25 7.65 3.75 3.65 -0.10 6.00 7.27 3.70 3.90 0.20 6.50 8.00 3.55 3.65 0.10 7.00 8.50 3.60 4.10 0.50 6.80 8.75 3.65 4.25 0.60 6.80 9.21 3.70 3.65 -0.05 6.50 8.27 3.75 3.75 0.00 5.75 7.67 3.80 3.85 0.05 5.80 7.93 3.70 4.25 0.55 6.80 9.26