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

Multiple Choice

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:


Interpret the interval given in the printout.

A) We are $95 \%$ confident that the average price of all hard drives with 33 megahertz speed and 386 CPU falls between $\$ 3,943$ and $\$ 4,987$ .
B) We are $95 \%$ confident that the price of a single hard drive falls between $\$ 3,943$ and $\$ 4,987$ .
C) We are $95 \%$ confident that the average price of all hard drives falls between $\$ 3,943$ and $\$ 4,987 .$
D) We are $95 \%$ confident that the price of a single hard drive with 33 megahertz speed and 386 CPU falls between $\$ 3,943$ and $\$ 4,987$ .