Statistics Homework Solutions 177

Statistics Homework Solutions 177 - 177 SECTION 7.4 ¡ 0...

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Unformatted text preview: 177 SECTION 7.4 ¡ 0 1119 500 ¡¥ ¤ ¨ ¢ 106 11 162 06. ¨ ¨ (b) y ¡ (c) Below. For values of x near 500, there are more points below the least squares estimate than above it. (d) There is a greater amount of vertical spread on the right side of the plot than on the left. Section 7.4 0 79833ln x ¢ ¡ ¡ ¢ 231 76. ¡ ¢ ¡ ¡ ¡ ¡ ¢ 0 4442 0 79833 ln1600 ¢ eln y 330 95. ¢ ¡ ¡ ¡ (c) y ¡ e 0 4442 0 79833 ln2500 e ¨ ¨ eln y (b) y ¨ ¢ 0 4442 ¨ 1. (a) ln y ¡ (d) The 95% prediction interval for ln y is given as (3.9738, 6.9176). The 95% prediction interval for y is therefore e3 9738 e6 9176 , or (53.19, 1009.89).  ¤ 1 269x ¨ ¢ 20 162 ¥ ¨ ¡ 3. (a) y 15 (b) Residual 10 There is no apparent pattern to the residual plot. The linear model looks fine. 5 0 −5 −10 50 55 60 65 Fitted Value 70 75 ...
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This note was uploaded on 12/20/2011 for the course STA 3163 taught by Professor Mattgilg during the Fall '11 term at UNF.

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