MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:The accompanying data are the number of wins and the earned run averages (mean number of earned runs allowed per nine innings pitched) for eight baseball pitchers in a recent season. Find the equation of the regression line.
Then construct a scatter plot of the data and draw the regression line. Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. If the x-value is not meaningful to predict the value of y,
explain why not.
(a) x = 5 wins
E Click the icon to view the table of numbers of wins and earned run average.
(b) x = 10 wins
(c) x = 21 wins
(d) x = 15 wins
- X
Wins and ERA
The equation of the regression line is y = x +
(Round to two decimal places as needed.)
Earned run
Wins, x
average, y
20
2.63
18
3.36
17
2.63
16
3.76
14
3.89
12
4.27
11
3.83
9
5.16
Transcribed Image Text:(b) Predict the ERA for 10 wins, if it is meaningful. Select the correct choice below and, if necessary, fill in the answer box within your choice.
| (Round to two decimal places as needed.)
B. It is not meaningful to predict this value of y because x= 10 is not an x-value in the original data.
O. tis not meaningful to predict this value of y because x= 10 is inside the range of the original data.
(C) Predict the ERA for 21 wins, if it is meaningful. Select the correct choice below and, if necessary, fil in the answer box within your choice.
OA. ŷ-
| (Round to two decimal places as needed.)
OB. It is not meaningful to predict this value of y because x= 21 is not an x-value in the original data.
OC. tis not meaningful to predict this value of y because x= 21 is well outside the range of the original data.
(d) Predict the ERA for 15 wins, if it is meaningful. Select the correct choice below and, if necessary, fl in the answer box within your choice.
O A. ŷ- (Round to two decimal places as needed.)
O B. It is not meaningful to predict this value of y because x= 15 is inside the range of the original data.
OC. t is not meaningful to predict this value of y because x= 15 is not an x-value in the original data.
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