You are a marketing analyst and gather the following data:
Advertising Expenditures ($100) Sales ($1000)
1 1
2 1
3 2
4 2
5 4
Solve the following questions by hand:
Estimatethemeansalesforallmonthsduringwhich$400(x=4)isexpended on advertising
If we expend $400 (x=4) in advertising next month, we want to predict the sales revenue for that month
Find a 95% confidence interval for the mean sales when advertising is $400 (x=4)
Predict the sales when advertising is $400 (x=4). Use a 95% prediction interval.