Consider the monthly international passenger totals in Table 15.8 on page 690. Use Minitab and Winters€™ method in month 132 to find point predictions of and 95 percent prediction intervals for the monthly international passenger totals in months 133 through 144. Set each of the smoothing constants alpha, gamma, and delta equal to .2.

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Monthly International Passenger Totals (Thousands of Passengers) os AirPass TABLE 15.8 Year Jan. Feb. Aug. Nov. Mar. Apr. July Sept. Oct. Dec. May June 135 1 129 148 148 136 104 112 118 132 141 178 193 236 235 267 121 125 172 183 119 133 162 118 135 126 149 178 158 184 209 140 115 145 170 199 170 199 114 146 172 163 150 166 194 4 180 171 196 204 181 218 230 242 272 293 347 191 235 196 188 233 229 234 243 201 229 278 264 302 237 211 229 180 203 237 6. 259 264 227 242 270 274 269 315 364 312 284 277 301 318 313 413 465 491 405 467 355 271 305 306 336 8 317 356 318 355 363 374 306 347 359 407 348 404 422 435 315 404 348 10 340 362 406 505 310 337 472 405 360 362 548 559 463 11 342 396 420