The director of marketing at a large company wants to determine if the amount of money spent on internet marketing is a good predictor of company profit. she fits a least-squares regression line to 20 months of data and computes the following regression line:
profit = 372.6 + 17.2(advertising dollars)
what is the value of the residual for advertising dollars spent equal to $1,020 and profit equal to $17,500? round to the nearest integer.

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0