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How long does it take to finish the 1161-mile Iditarod Dog Sled Race from Anchorage to Nome, Alaska? Finish times (to the nearest hour) for 57 dogsled teams are shown below.

261 | 271 | 236 | 244 | 279 | 296 | 284 | 299 | 288 |

288 | 247 | 256 | 338 | 360 | 341 | 333 | 261 | 266 |

287 | 296 | 313 | 311 | 307 | 307 | 299 | 303 | 277 |

283 | 304 | 305 | 288 | 290 | 288 | 289 | 297 | 299 |

332 | 330 | 309 | 328 | 307 | 328 | 285 | 291 | 295 |

298 | 306 | 315 | 310 | 318 | 318 | 320 | 333 | 321 |

323 | 324 | 327 |

For this problem, use five classes.

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