Statistics for Business and Economics (13th Edition)
13th Edition
ISBN: 9780134506593
Author: James T. McClave, P. George Benson, Terry Sincich
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 11.112ACI
Doctors and ethics. Refer to the Journal of Medical Ethics (Vol. 32, 2006) study of physicians’ use of ethics consultation, Exercise 2.166 (p. 120). Recall that the medical researchers measured the length of lime in practice (i.e .. years of experience) and the amount of exposure to ethics in medical school (number of hours) for a sample of 118 physicians. Consider a straight-line regression model relating hours of exposure (y) to time in practice (x).
- a. Fit the model to the data saved in the file and conduct a test (at α = .05 ) for a linear relationship between the two variables.
- b. In Exercise 2.166 you identified a highly suspect outlier for hours of exposure. Remove this outlier from the data set and rerun the analysis. part a. What do you observe?
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??=?+????+????+????
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Predictor Coef StDev t-ratio p-value
Constant 5491.38 2508.81 2.1888 0.0491
OIL 85.39 18.46 4.626 0.0006
EXP -377.08 112.19 * 0.0057
FDI -396.99 160.66 -2.471 **
S = 2.45 R-sq = 96.3% R-sq(adj) = 95.3%…
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A researcher interested in explaining the level of foreign reserves for the country of Barbados estimated the following multiple regression model using yearly data spanning the period 2001 to 2016:
??=?+????+????+???I
Where FR = yearly foreign reserves ($000’s), OIL = annual oil prices, EXP = yearly total exports ($000’s) and FDI = annual foreign direct investment ($000’s). The sample of data was processed using MINITAB and the following is an extract of the output obtained:
Predictor
Coef
StDev
t-ratio
p-value
Constant
5491.38
2508.81
2.1888
0.0491
Oil
85.39
18.46
4.626
0.0006
EXP
-377.08
112.19
*
0.0057
FDI
-396.99
160.66
-2.471
**
S = 2.45 R – sq = 96.3% R – sq (adj) = 95.3%
Analysis of Variance
Source
DF
SS
MS
F
P
Regression
3
1991.31
663.77
?
??
Error
12
77.4
6.45
Total
15
e) Perform the F Test making sure to state…
Chapter 11 Solutions
Statistics for Business and Economics (13th Edition)
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