A liquor wholesaler is interested in assessing the effect of the price of a premium scotch whiskey on the quantity sold. The results in the accompanying table on pric in dollars, and sales, in cases. were obtained from a sample of 8 weeks of sales records. Price 19.1 20.3 10.8 21.2 20.8 20.1 1?.8 17.3 :1 Sales 25.5 15.1 18.1 11.1 11.1 15.4 20.2 35.6 a. Estimate by least squares the linear regression 01 Increase In sales on Increase In price. b. Find a 90% condence interval for the slope of the population regression line Click to View the table of crItical values of the Student's t distribution. 5- Yr = + Dxi (Round to three decimal places as needed.)