The regression equation is
Sales/Week = 994 + 8.22 Intelligence + 49.7 Extroversion
Term Coef SE Coef T-Value P-Value
Constant 994 788 1.26 0.224
Intelligence 8.22 7.01 1.17 0.257
Extroversion 49.7 19.6 2.53 0.021
S R-sq R-sq(adj) R-sq(pred)
332.069 35.26% 27.65% 10.66%
Analysis of Variance
Source DF Adj SS Adj MS F-Value P-Value
Regression 2 1021166 510583 4.63 0.025
Error 17 1874584 110270
Total 19 2895750
Predicted Values for New Observations
New
Obs Fit SE Fit 90% CI 90% PI
1 2885.62 167.445 (2594.34, 3176.91) (2238.67, 3532.58)
2 3379.99 176.933 (3072.19, 3687.78) (2725.43, 4034.54)
3 2785.05 100.991 (2609.35, 2960.72) (2181.25, 3388.83)
Values of Predictors for New Observations
Obs Intelligence Extroversion
1 85 24
2 127 27
3 103 19
What is a 90% confidence interval for the average sales per week for all people with an intelligence score of 103 and an extroversion score of 19?
(2594.34, 3176.91)
(2609.35, 2960.72)
(2181.25, 3388.83)
(3072.19, 3687.78)
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