d) Using the output in Figure 4, determine the estimated least squares regression equation that represents the relationship between Cost (y) and number of passengers (x)? e) Use the regression equation from (d) to estimate the Cost when number of passengers are 80 and comment on the usefulness of this prediction UMMARY OUTPUT

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Suppose a study is conducted using only Boeing 737s traveling 800Kms on
comparable routes during the same season of the year. Can the number of
passengers predict the cost of flying such routes? It seems logical that more
passengers result in more weight and more baggage, which could, in turn, result in
increased fuel consumption and other costs. Suppose the data displayed in the
table below are the costs and associated number of passengers for twelve 800-kms
commercial airline flights using Boeing 737s during the same season of the year.
We will use these data to develop a regression model to predict cost by number of
passengers. A plot of the data collected is shown in Figure 3.
Cost
600
550
500
450
400
350
300
5
6
6
7
7
8
Number of Passengers
8
9
9
10
Figure 3: Scatter plot of number of passengers on the x-axis and
Cost on the y-axis.
Transcribed Image Text:Suppose a study is conducted using only Boeing 737s traveling 800Kms on comparable routes during the same season of the year. Can the number of passengers predict the cost of flying such routes? It seems logical that more passengers result in more weight and more baggage, which could, in turn, result in increased fuel consumption and other costs. Suppose the data displayed in the table below are the costs and associated number of passengers for twelve 800-kms commercial airline flights using Boeing 737s during the same season of the year. We will use these data to develop a regression model to predict cost by number of passengers. A plot of the data collected is shown in Figure 3. Cost 600 550 500 450 400 350 300 5 6 6 7 7 8 Number of Passengers 8 9 9 10 Figure 3: Scatter plot of number of passengers on the x-axis and Cost on the y-axis.
d) Using the output in Figure 4, determine the estimated least squares
regression equation that represents the relationship between Cost (y) and
number of passengers (x)?
e) Use the regression equation from (d) to estimate the Cost when number of
passengers are 80 and comment on the usefulness of this prediction
SUMMARY OUTPUT
Regression Statistics
Multiple R
R Square
Adjusted R Square
Standard Error
Observations
Intercept
Number of Passengers
0.9513
0.9050
0.8977
162.1952
15
Coefficients Standard Errort Stat
1600.783
40.436
P-value Lower 95% Upper 95%
5.501 0.000 972.068
11.129 0.000
32.587
291.022
3.633
2229.498
48.285
Figure 4: Output from regression analysis on number of passengers / Cost data
Transcribed Image Text:d) Using the output in Figure 4, determine the estimated least squares regression equation that represents the relationship between Cost (y) and number of passengers (x)? e) Use the regression equation from (d) to estimate the Cost when number of passengers are 80 and comment on the usefulness of this prediction SUMMARY OUTPUT Regression Statistics Multiple R R Square Adjusted R Square Standard Error Observations Intercept Number of Passengers 0.9513 0.9050 0.8977 162.1952 15 Coefficients Standard Errort Stat 1600.783 40.436 P-value Lower 95% Upper 95% 5.501 0.000 972.068 11.129 0.000 32.587 291.022 3.633 2229.498 48.285 Figure 4: Output from regression analysis on number of passengers / Cost data
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