ELEMENTARY STATISTICS-ALEKS ACCESS CODE
3rd Edition
ISBN: 9781265787219
Author: Navidi
Publisher: MCG
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Chapter 13.3, Problem 18E
To determine
To find:The most appropriate action for dropping one of the explanatory variables.
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The money raised and spent (both in millions of dollars) by all congressional campaigns for 8 recent 2-year periods are shown in the table. The equation of
A
the regression line is y = 0.952x+20.570. Find the standard error of estimates, and interpret the result.
Money ralsed, x
Money spent, y
460.5
434.1
651.5
689.3
Find the standard error of estimate s and interpret the result.
(Round to three decimal places as needed.)
738.8
735.3
780.3
755.8
781.2
732.5
1025.3
1011.3
950.6
929.9
1205.2
11554
Use data on tab “printers data.”
--Run a regression with “Cartridges” as the dependent variable and “Printers” as the independent variable. Place the regression output at cell “I2.”
--Create a scatter plot with “printers” as the x-axis and “cartridges” as the y-axis.
Place the plot in cell “I22.”
--In cell C2 type “Forecast.” In column C, create a cartridge forecast for each printer quantity
--In cell D2 type “%error”. In column D calculate the percentage error for each forecasted quantity from each actual cartridge value.
--In cell E2 type “ABS[A-F]” and in that column calculate the absolute value of each actual (column B) versus each forecast (column C).
--In cell F2 type “Sum ABS[A-F]”
--In cell F3 sum the values of column E
--In Cell G2 type “MAD”
--In cell G3 calculate the Mean Absolute deviation
Printers
Cartridges
19
57
15
60
15
60
15
75
16
80
14
42
10
40
12
36
20
80
19
76
17
85
19
76
18
72
12
48
17
85
13
65
17
68
11
55
19
76
14
42
The money raised and spent (both in millions of dollars) by all congressional campaigns
for 8 recent 2-year periods are shown in the table. The equation of the regression line is
y = 0.958x+7.214. Find the coefficient of determination and interpret the result.
Money raised, 471.5 666.3 732.7
X
Money spent, y 441.1 677.4 729.8 750.1 726.6 1000.7 937.7 1165.2
Find the coefficient of determination and interpret the result.
r2 =
(Round to three decimal places as needed.)
How can the coefficient of determination be interpreted?
O A. The coefficient of determination is the fraction of the variation in money spent
that can be explained by the variation in money raised. The remaining fraction of
the variation is unexplained and is due to other factors or to sampling error.
OB. The coefficient of determination is the fraction of the variation in money spent
that is unexplained and is due to other factors or sampling error. The remaining
fraction of the variation is explained by the variation in…
Chapter 13 Solutions
ELEMENTARY STATISTICS-ALEKS ACCESS CODE
Ch. 13.1 - Prob. 7ECh. 13.1 - Prob. 8ECh. 13.1 - In Exercises 9 and 10, determine whether the...Ch. 13.1 - Prob. 10ECh. 13.1 - Prob. 11ECh. 13.1 - Prob. 12ECh. 13.1 - Prob. 13ECh. 13.1 - Prob. 14ECh. 13.1 - Prob. 15ECh. 13.1 - Prob. 16E
Ch. 13.1 - Prob. 17ECh. 13.1 - Prob. 18ECh. 13.1 - Prob. 19ECh. 13.1 - Prob. 20ECh. 13.1 - Prob. 21ECh. 13.1 - Prob. 22ECh. 13.1 - Prob. 23ECh. 13.1 - Prob. 24ECh. 13.1 - Prob. 25ECh. 13.1 - Prob. 26ECh. 13.1 - Prob. 27ECh. 13.1 - Prob. 28ECh. 13.1 - Prob. 26aECh. 13.1 - Calculator display: The following TI-84 Plus...Ch. 13.1 - Prob. 28aECh. 13.1 - Prob. 29ECh. 13.1 - Prob. 30ECh. 13.1 - Confidence interval for the conditional mean: In...Ch. 13.2 - Prob. 3ECh. 13.2 - Prob. 4ECh. 13.2 - Prob. 5ECh. 13.2 - Prob. 6ECh. 13.2 - Prob. 7ECh. 13.2 - Prob. 8ECh. 13.2 - Prob. 9ECh. 13.2 - Prob. 10ECh. 13.2 - Prob. 11ECh. 13.2 - Prob. 12ECh. 13.2 - Prob. 13ECh. 13.2 - Prob. 14ECh. 13.2 - Prob. 15ECh. 13.2 - Prob. 16ECh. 13.2 - Prob. 17ECh. 13.2 - Dry up: Use the data in Exercise 26 in Section...Ch. 13.2 - Prob. 19ECh. 13.2 - Prob. 20ECh. 13.2 - Prob. 21ECh. 13.3 - Prob. 7ECh. 13.3 - Prob. 8ECh. 13.3 - Prob. 9ECh. 13.3 - In Exercises 9 and 10, determine whether the...Ch. 13.3 - Prob. 11ECh. 13.3 - Prob. 12ECh. 13.3 - Prob. 13ECh. 13.3 - For the following data set: Construct the multiple...Ch. 13.3 - Engine emissions: In a laboratory test of a new...Ch. 13.3 - Prob. 16ECh. 13.3 - Prob. 17ECh. 13.3 - Prob. 18ECh. 13.3 - Prob. 19ECh. 13.3 - Prob. 20ECh. 13.3 - Prob. 21ECh. 13.3 - Prob. 22ECh. 13.3 - Prob. 23ECh. 13 - A confidence interval for 1 is to be constructed...Ch. 13 - A confidence interval for a mean response and a...Ch. 13 - Prob. 3CQCh. 13 - Prob. 4CQCh. 13 - Prob. 5CQCh. 13 - Prob. 6CQCh. 13 - Construct a 95% confidence interval for 1.Ch. 13 - Prob. 8CQCh. 13 - Prob. 9CQCh. 13 - Prob. 10CQCh. 13 - Prob. 11CQCh. 13 - Prob. 12CQCh. 13 - Prob. 13CQCh. 13 - Prob. 14CQCh. 13 - Prob. 15CQCh. 13 - Prob. 1RECh. 13 - Prob. 2RECh. 13 - Prob. 3RECh. 13 - Prob. 4RECh. 13 - Prob. 5RECh. 13 - Prob. 6RECh. 13 - Prob. 7RECh. 13 - Prob. 8RECh. 13 - Prob. 9RECh. 13 - Prob. 10RECh. 13 - Air pollution: Following are measurements of...Ch. 13 - Icy lakes: Following are data on maximum ice...Ch. 13 - Prob. 13RECh. 13 - Prob. 14RECh. 13 - Prob. 15RECh. 13 - Prob. 1WAICh. 13 - Prob. 2WAICh. 13 - Prob. 1CSCh. 13 - Prob. 2CSCh. 13 - Prob. 3CSCh. 13 - Prob. 4CSCh. 13 - Prob. 5CSCh. 13 - Prob. 6CSCh. 13 - Prob. 7CS
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