Retail Price Data for N = 60 Hard Disk Drives $y =$

Essay

Retail price data for n = 60 hard disk drives were recently reported in a computer
magazine. Three variables were recorded for each hard disk drive: $y =$ Retail PRICE (measured in dollars)
$x _ { 1 } =$ Microprocessor SPEED (measured in megahertz)
(Values in sample range from 10 to 40 )
$x _ { 2 } =$ CHIP size (measured in computer processing units)
(Values in sample range from 286 to 486 )
A first-order regression model was fit to the data. Part of the printout follows:


Test to determine if the model is adequate for predicting the price of a computer. Use $\alpha =$ $.01$ .