Practice 2

An analysis of the data shows the following output

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Unformatted text preview: sis of the data shows the following output. There are 36 consecutive months of data, and the analysis includes the two marked points. Bivariate Fit of Sales By Rate Summary of Fit Root Mean Square Error Mean of Response Observations (or Sum Wgts) 1691.5 11218 36 Analysis of Variance Source Model Error C. Total DF 1 34 35 Sum of Squares 54107790 97276095 151383885 Mean Square 54107790 2861061.6 F Ratio 18.9118 Prob > F 0.0001* Parameter Estimates Term Intercept Rate Estimate 21973.69 -1201.36 Std Error 2489.25 276.253 t Ratio 8.83 -4.35 Prob>|t| <.0001* 0.0001* 1. If the average mortgage rate in the region falls by 2 per cent, the fitted model predicts that A. Sales will increase between about 650 and 1,755 units, with 95 per cent confidence. B. Sales will increase between about 1,300 and 3,510 units, with 95 per cent confidence. C. The average sale price will increase between about $1,300 and $3,510, with 95 per cent confidence. D. Sales wil...
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This note was uploaded on 01/16/2014 for the course STAT 102 taught by Professor Shaman during the Fall '08 term at UPenn.

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