TABLE 12-11A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amountof revenue (in thousands of dollars) he can make on the full version of the new shareware. Following is the output from a simple linear regression along withthe residual plot and normal probability plot obtained from a data set of 30 different sharewares that he has developed:Regression StatisticsMultiple RR SquareAdjusted R SquareStandard ErrorObservations0.86910.75540.746744.476530.0000ANOVASignificance F0.0000dfSS171062.9193 171062.9193MSRegressionResidual86.47592855388.43091978. 1582Total29226451.3503Standard Error26.91830.4011P-valueInterceptDownloadCoefficients95.06143.7297t Stat3.53159.29920.00150.0000Lower 95%-150, 2009Upper 95%39.92182.90824.5513Download Residual Plot12010080604020-20-40-60-8010020.0060.0080.00100.00120.000.0040.00DownloadNormal Probability Plot120100604020-2040ResidualsResiduals -1000.0020.0040.0060.0080.00100.00120.00DownloadNormal Probability Plot12010080604020-2040-60-80-100-3-2-1Z ValueReferring to Table 12-11, which of the following assumptions appears to have been violated?Seleccione una:O A.independence of errorsOB.normality of errorhomoscedasticityOD.none of the aboveResiduals

From the above graph The error are not in straight line So here Normality assumption is Violated

0.00 20.00 40.00 60.00 80.00 100.00 120.00 Download Normal Probability Plot 120 100 60 40 -60 -80 -100 -1 Z Value Referring to Table 12-11, which of the following assumptions appears to have been violated? Seleccione una: O A. independence of errors OB. normality of error OC. homoscedasticity OD. none of the above

0.00 20.00 40.00 60.00 80.00 100.00 120.00 Download Normal Probability Plot 120 100 60 40 -60 -80 -100 -1 Z Value Referring to Table 12-11, which of the following assumptions appears to have been violated? Seleccione una: O A. independence of errors OB. normality of error OC. homoscedasticity OD. none of the above

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

TABLE 12-11
A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount
of revenue (in thousands of dollars) he can make on the full version of the new shareware. Following is the output from a simple linear regression along with
the residual plot and normal probability plot obtained from a data set of 30 different sharewares that he has developed:
Regression Statistics
Multiple R
R Square
Adjusted R Square
Standard Error
Observations
0.8691
0.7554
0.7467
44.4765
30.0000
ANOVA
Significance F
0.0000
df
SS
171062.9193 171062.9193
MS
Regression
Residual
86.4759
28
55388.4309
1978. 1582
Total
29
226451.3503
Standard Error
26.9183
0.4011
P-value
Intercept
Download
Coefficients
95.0614
3.7297
t Stat
3.5315
9.2992
0.0015
0.0000
Lower 95%
-150, 2009
Upper 95%
39.9218
2.9082
4.5513
Download Residual Plot
120
100
80
60
40
20
-20
-40
-60
-80
100
20.00
60.00
80.00
100.00
120.00
0.00
40.00
Download
Normal Probability Plot
120
100
60
40
20
-20
40
Residuals
Residuals

-100
0.00
20.00
40.00
60.00
80.00
100.00
120.00
Download
Normal Probability Plot
120
100
80
60
40
20
-20
40
-60
-80
-100
-3
-2
-1
Z Value
Referring to Table 12-11, which of the following assumptions appears to have been violated?
Seleccione una:
O A.
independence of errors
OB.
normality of error
homoscedasticity
OD.
none of the above
Residuals

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