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Unformatted text preview: P-Value Confidence Interval 95% 0.762296 0.120928 6.3037 <0.0001 (L) 0.519154 (U) 1.005439 The slope is 0.7623- which indicates that the sales index tends to increase by about 0.76 for each 1-unit increase in the promotional expenses index. 2/3 of the predictions will be within 7.39 of the actual sales values, and about 95% of the predictions will be within 2 standard errors, or 14.78, of the actual sales values. This is a pretty high level of variation when used in predictions....
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- Fall '11