Referring to Scenario 13-11, what is the critical value for testing whether there is a linear relationship between revenue and the number of downloads at a 5% level of significance?
Referring to Scenario 13-11, what is the critical value for testing whether there is a linear relationship between revenue and the number of downloads at a 5% level of significance?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 4SGR
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Question
6. Referring to Scenario 13-11, what is the critical value for testing whether there is a linear relationship between revenue and the number of downloads at a 5% level of significance?
Transcribed Image Text:SCENARIO 13-11
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
0.8691
0.7554
0.7467
44.4765
Observations
30.0000
ANOVA
df
MS
Significance F
0.0000
F
Regression
171062.9193 171062.9193
86.4759
Residual
28
55388.4309
1978. 1582
Total
29
226451.3503
Standard Error
26.9183
t Stat
-3.5315
Lower 95%
Upper 95%
Coefficients
P-value
Intercept
-95.0614
0.0015
-150.2009
-39.9218
Download
3.7297
0.4011
9.2992
0.0000
2.9082
4.5513
Download Residual Plot
Normal Probability Plot
120
120
100
100
80
80
60
60
40
40
20
20
-20
-20
40
-40
-60
-60
-80
-80
-100
-100
0.00
20.00
40.00
60.00
80.00
100.00
120.00
-3
-1
Download
Z Value
2.
2.
sjerpisay
Residuals
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