How long does it take to finis
How long does it take to finish the 1161-mile Iditarod Dog SledRace from Anchorage to Nome, Alaska? Finish times (to the nearesthour) 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 |
(a) Find the class width.
(b) Make a frequency table showing class limits, classboundaries, midpoints, frequencies, relative frequencies, andcumulative frequencies. (Give relative frequencies to 2 decimalplaces.)
(c) Draw a histogram.
(d) Draw a relative-frequency histogram.
(e) Categorize the basic distribution shape.
(f) Draw an ogive. (Graph each point and the closed linesegments connecting the points to create your graph.)
Answer:
A)
B)
C)
D)
E) Basic shape of the distribution is approximately normal.
F)
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