ch03_solutions - A B C D E F G H I J K L 1 2 3 4 5 6 7 8 9...

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Ex. 3.8 Average Year Quarter Qtr. # Data Trend Seasonal Seasonals 1998 Win 1 123 166.12 0.74 0.74 Spr 2 133 171.29 0.78 0.86 Sum 3 172 176.45 0.97 1.07 Fall 4 281 181.62 1.55 1.33 1999 Win 5 155 186.78 0.83 Spr 6 189 191.95 0.98 Sum 7 205 197.11 1.04 Fall 8 286 202.28 1.41 2000 Win 9 207.44 Spr 10 212.60 Sum 11 217.77 Fall 12 222.93 2001 Win 13 151 228.10 0.66 Spr 14 186 233.26 0.80 Sum 15 288 238.43 1.21 Fall 16 303 243.59 1.24 2002 Win 17 178 248.75 0.72 Spr 18 225 253.92 0.89 Sum 19 272 259.08 1.05 Fall 20 296 264.25 1.12 2003 Win 21 269.41 Spr 22 Predicted 274.58 Sum 23 299.3218 279.74 Fall 24 284.91 1 2 3 4 5 6 7 8 9 1011121314151617181920 0 50 100 150 200 250 300 350 f(x) = 5.1643939394x + 160.9613636364 R² = 0.2929000732 Sales by Quarter Quarter Sales =1.07*279.74
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Unformatted text preview: A B C D E F G H I J K L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Year Advertising Sales 1 3.3 167.5 2 3.4 162.6 3 3.6 172.8 4 3.6 170.7 5 3.7 172.8 6 3.9 177.6 7 4.1 170.0 8 4.1 185.8 9 4.4 181.6 10 4.5 196.4 11 4.7 178.3 12 4.9 198.3 13 5.1 198.5 14 5.2 208.7 15 5.5 204.7 3 4 5 6 150 160 170 180 190 200 210 220 f(x) = 19.2268292683x + 101.052195122 R² = 0.8334170707 Advertising Sales A B C D E F G H I J K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21...
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ch03_solutions - A B C D E F G H I J K L 1 2 3 4 5 6 7 8 9...

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