Below you are given a partial computer output based on a sample of 12 observations relating to
Question:
Below you are given a partial computer output based on a sample of 12 observations relating to the number of personal computers sold by a computer shop per month (y), unit price (x1 in $1000), and the number of advertising spots (x2) used on a local television station.
Coefficients | Standard Error | |
Constant | 17.145 | 7.865 |
x1 | -0.104 | 3.282 |
x2 | 1.376 | 0.250 |
a. | Use the output shown above and write an equation that can be used to predict the monthly sales of computers. |
b. | Interpret the coefficients of the estimated regression equation found in Part a. |
c. | If the company charges $2000 for each computer and uses 10 advertising spots, how many computers would you expect them to sell? |
d. | At α = .05, test to determine if the number of advertising spots is a significant variable. |
Essentials of Statistics for Business and Economics
ISBN: 978-1305081598
7th edition
Authors: David Anderson, Thomas Williams, Dennis Sweeney, Jeffrey Cam