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

question 14

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:





Identify and interpret the estimate for the SPEED $\beta$ -coefficient, $\hat { \beta } _ { 1 }$ .

• A) \(\hat { \beta } _ { 1 } = 3.57\); For every \(\$ 1\) increase in PRICE, we estimate SPPED to increase by about 4 megahertz, holding CHIP fixed.
• B) \(\hat { \beta } _ { 1 } = 3.57\); For every 1 -megahertz increase in SPEED, we estimate PRICE to increase \(\$ 3,57\), holding CHIP fixed.
• C) \(\hat { \beta } _ { 1 } = 105\); For every \(\$ 1\) increase in PRICE, we estimate SPEED to increase 105 megahertz, holding CHIP fixed.
• D) \(\hat { \beta } 1 = 105\); For every 1 -megahertz increase in SPEED, we estimate PRICE (y) to increase \(\$ 105\), holding CHIP fixed.

---

Definitions:

Trial Exhibits

Materials or objects presented during a trial as evidence to support the arguments of either side in a legal dispute.

Litigation Paralegal

A paralegal specializing in the process of taking legal action, including lawsuit preparation.

Attention To Detail

The careful consideration and focus on the small parts or aspects of a task or activity to ensure accuracy and completeness.

Appellate Court

A court that reviews the decisions of lower courts to determine if legal errors were made that could change the outcome of the case.