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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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wasala18 wasala18
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A year ago
Consider the following regression analysis for predicting sales per week from intelligence and extroversion scores:

​

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

​

New

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)

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
Author:
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IgnesiasIgnesias
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A year ago
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wasala18 Author
wrote...

A year ago
Thank you, thank you, thank you!
jaray75
wrote...

Yesterday
This helped my grade so much Perfect
courtneyrmcd
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2 hours ago
Helped a lot
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