Question 270053: If we use values beyond our data set then
a. the predicted value can be wrong
b. the linear model may not fit the trend
c. A & B
9. When we find a variable that is statically significant
a. it allows us to build a model for estimating points
b. it can referred to as a “driver” of the change
c. A & B
d. it is important based on Bohme’s theory of significance
10.A point estimate for 8 units is
a. 8
b. 6.5
c. 7.36
11. A confidence interval for a sample average of 8 units
a. 4.72 to 9.56
b. 4.03 to 8.97
c. -1.05 to 14.05
d. 1.15 to 14.05
12. A confidence interval for a individual point of 8 units
a. 4.72 to 9.56
b. 4.03 to 8.97
c. -1.05 to 14.05
d. 1.15 to 14.05
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The regression equation is
Sales1 = - 0.86 + 0.920 Units
Predictor Coef SE Coef T P
Constant -0.864 3.265 -0.26 0.799
Units 0.9203 0.4219 2.18 0.066
S = 3.76362 R-Sq = 40.5% R-Sq(adj) = 32.0%
Analysis of Variance
Source DF SS MS F P
Regression 1 67.40 67.40 4.76 0.066
Residual Error 7 99.15 14.16
Total 8 166.55
Unusual Observations
Obs Units Sales1 Fit SE Fit Residual St Resid
1 12.4 17.10 10.55 2.55 6.55 2.37R
7 11.2 2.90 9.44 2.12 -6.54 -2.10R
R denotes an observation with a large standardized residual.
Predicted Values for New Observations
New
Obs Fit SE Fit 90% CI 90% PI
1 6.50 1.31 (4.03, 8.97) (-1.05, 14.05)
Values of Predictors for New Observations
New
Obs Units
1 8.00
If we use values beyond our data set then
a. the predicted value can be wrong
b. the linear model may not fit the trend
c. A & B
Ans: c
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9. When we find a variable that is statically significant
a. it allows us to build a model for estimating points
b. it can referred to as a “driver” of the change
c. A & B
d. it is important based on Bohme’s theory of significance
Ans: I would say "a"
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10.A point estimate for 8 units is
a. 8
b. 6.5
c. 7.36
Ans: Sales(8)=-.86 = 0.92*8 = 6.5
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11. A confidence interval for a sample average of 8 units
a. 4.72 to 9.56
b. 4.03 to 8.97
c. -1.05 to 14.05
d. 1.15 to 14.05
Ans: 4.03 to 8.97 is the answer for either question 11 or question 12
I would have to read some text material to pin it down.
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12. A confidence interval for a individual point of 8 units
a. 4.72 to 9.56
b. 4.03 to 8.97
c. -1.05 to 14.05
d. 1.15 to 14.05
Ans: See answer to question 11
Cheers,
Stan H.
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