STAT TECH IN BUSINESS & ECON AC
18th Edition
ISBN: 9781264731657
Author: Lind
Publisher: MCG
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Chapter 14, Problem 8E
The following regression output was obtained from a study of architectural firms. The dependent variable is the total amount of fees in millions of dollars.
x1 is the number of architects employed by the company.
x2 is the number of engineers employed by the company.
x3 is the number of years involved with health care projects.
x4 is the number of states in which the firm operates.
x5 is the percent of the firm’s work that is health care–related.
- a. Write out the regression equation.
- b. How large is the sample? How many independent variables are there?
- c. Conduct a global test of hypothesis to see if any of the set of regression coefficients could be different from 0. Use the .05 significance level. What is your conclusion?
- d. Conduct a test of hypothesis for each independent variable. Use the .05 significance level. Which variable would you consider eliminating first?
- e. Outline a strategy for deleting independent variables in this case.
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Rick is a school principal, and he is trying to decide if there is a relationship between conduct infractions
and the number of students present at school during the day when infractions occur. How should he set
up a scatterplot to help him see if there is a relationship?
O plot the number of infractions on the y-axis and the number of students present on the x-axis
O plot the number of infractions on the y-axis and the day of the week on the x-axis
O plot the number of infractions on the x-axis and the number of students present on the y-axis
O plot the number of infractions on the x-axis and the day of the week on the y-axis
A real estate agent wanted to find the relationship between sale price of houses and the size of the house.
She collected data on two variables recorded in the following table for 15 houses in Seattle. The two variables
are
PRICE= Sale price of houses in thousands of dollars
SIZE= Area of the entire house in square feet.
PRICE
455
278
463
327
505
264
445
346
487
289
434
411
223
323
488
250
225
290
180
320
240
270
205
285
240
260
230
170
230
298
SIZE
a) Using MICROSOFT EXCEL- run the above regression and copy the output into your assignment word document
from which you can write down the least square regression line. Write down the least square regression line
from that specific output. USE THE NAME OF VARIABLES WHEN YOU WRITE THE EQUATION.
b) Interpret the slope and constant term with proper UNITS assigned.
c) Comment on the explanatory power of the regression model from the required output. Copy that specific
output into your assignment word document.
Now to increase the explanatory…
Chapter 14 Solutions
STAT TECH IN BUSINESS & ECON AC
Ch. 14 - There are many restaurants in northeastern South...Ch. 14 - Prob. 1ECh. 14 - Thompson Photo Works purchased several new, highly...Ch. 14 - A consulting group was hired by the Human...Ch. 14 - Cellulon, a manufacturer of home insulation, wants...Ch. 14 - Refer to Self-Review 141 on the subject of...Ch. 14 - Prob. 5ECh. 14 - Prob. 6ECh. 14 - Prob. 3SRCh. 14 - Given the following regression output, answer the...
Ch. 14 - The following regression output was obtained from...Ch. 14 - A study by the American Realtors Association...Ch. 14 - The manager of High Point Sofa and Chair, a large...Ch. 14 - Prob. 10ECh. 14 - Prob. 11ECh. 14 - A real estate developer wishes to study the...Ch. 14 - Prob. 13CECh. 14 - Prob. 14CECh. 14 - Prob. 15CECh. 14 - Prob. 16CECh. 14 - The district manager of Jasons, a large discount...Ch. 14 - Suppose that the sales manager of a large...Ch. 14 - The administrator of a new paralegal program at...Ch. 14 - Prob. 20CECh. 14 - Prob. 21CECh. 14 - A regional planner is studying the demographics of...Ch. 14 - Great Plains Distributors, Inc. sells roofing and...Ch. 14 - Prob. 24CECh. 14 - Prob. 25CECh. 14 - Prob. 26CECh. 14 - Prob. 28CECh. 14 - Prob. 29CECh. 14 - The director of special events for Sun City...Ch. 14 - Prob. 31CECh. 14 - Prob. 32CECh. 14 - Prob. 33DACh. 14 - Prob. 34DACh. 14 - Prob. 35DACh. 14 - Prob. 1PCh. 14 - Quick-print firms in a large downtown business...Ch. 14 - The following ANOVA output is given. a. Compute...Ch. 14 - Prob. 1CCh. 14 - Prob. 2CCh. 14 - Prob. 3CCh. 14 - In a scatter diagram, the dependent variable is...Ch. 14 - What level of measurement is required to compute...Ch. 14 - If there is no correlation between two variables,...Ch. 14 - Which of the following values indicates the...Ch. 14 - Under what conditions will the coefficient of...Ch. 14 - Given the following regression equation, = 7 ...Ch. 14 - Given the following regression equation, = 7 ...Ch. 14 - Given the following regression equation, = 7 ...Ch. 14 - Prob. 1.9PTCh. 14 - In a multiple regression equation, what is the...Ch. 14 - Prob. 1.11PTCh. 14 - Prob. 1.12PTCh. 14 - For a dummy variable, such as gender, how many...Ch. 14 - What is the term given to a table that shows all...Ch. 14 - If there is a linear relationship between the...Ch. 14 - Given the following regression analysis output: a....Ch. 14 - Given the following regression analysis output. a....
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