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HW04a_sol_X

# HW04a_sol_X - 6.8 275 46.2 75,625 1,870 280.0(5.0(0.28 3.68...

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Problem 6-2 No Excel analysis

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Bus 1 8 859 2 5 682 3 3 471 4 9 708 5 11 1,094 6 2 224 7 1 320 8 8 651 9 12 1,049 Correlation coefficient calculation: X Y XY (X - Xavg)^2 8 859 64 737,881 6,872 2.09 5 682 25 465,124 3,410 2.42 3 471 9 221,841 1,413 12.64 9 708 81 501,264 6,372 5.98 11 1,094 121 1,196,836 12,034 19.75 2 224 4 50,176 448 20.75 1 320 1 102,400 320 30.86 8 651 64 423,801 5,208 2.09 12 1,049 144 1,100,401 12,588 29.64 - - - - - - Total 59 6,058 513 4,799,724 48,665 126.22 - - - - - - Count 9 Correlation 0.938 Linear regression line calculation Intercept: 208.2 Slope: 70.92 111.6 9.934 t 7.139 Forecast of Cost (Y) when Age (X) = 5: 562.8 Age, Years Cost, \$ X 2 Y 2 s y·x s b1 0 2 4 6 8 10 12 14 0 500 1,000 1,500 Cost versus Age Age, Years Cost, \$
Week 1 6.8 275 2 3.3 142 3 4.1 168 4 4.2 197 5 4.8 215 6 3.9 188 7 4.9 241 8 7.7 295 9 3.1 125 10 5.9 266 11 5.0 200 Correlation coefficient calculation: X Y XY Yhat Residuals SD from Syx (X - Xavg)^2 6.8 275 46.2
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Unformatted text preview: 6.8 275 46.2 75,625 1,870 280.0 (5.0) (0.28) 3.68 3.3 142 10.9 20,164 469 152.6 (10.6) (0.59) 2.50 4.1 168 16.8 28,224 689 181.7 (13.7) (0.76) 0.61 4.2 197 17.6 38,809 827 185.4 11.6 0.65 0.46 4.8 215 23.0 46,225 1,032 207.2 7.8 0.43 0.01 3.9 188 15.2 35,344 733 174.4 13.6 0.75 0.96 4.9 241 24.0 58,081 1,181 210.8 30.2 1.68 0.00 7.7 295 59.3 87,025 2,272 312.8 (17.8) (0.99) 7.94 3.1 125 9.6 15,625 388 145.3 (20.3) (1.13) 3.17 5.9 266 34.8 70,756 1,569 247.2 18.8 1.04 1.04 5.0 200 25.0 40,000 1,000 214.5 (14.5) (0.81) 0.01 Total 53.7 2,312 282.6 515,878 12,029 20.40 Count 11 Correlation 0.950 Linear regression line calculation Intercept: 32.46 Slope: 36.41 17.97 3.978 t 9.151 Forecast when X = 4: 178 Shelf Space, ft Books Sold X 2 Y 2 s y·x s b1 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 100 150 200 250 300 350 Books Sold versus Shelf Space Shelf Space, ft Books Sold...
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