(海南寧夏卷理16文16)從甲、乙兩品種的棉花中各抽測(cè)了25根棉花的纖維長(zhǎng)度(單位:mm),結(jié)果如下:由以上數(shù)據(jù)設(shè)計(jì)了如下莖葉圖:
甲 | | 乙 |
| | | 3 | 1 | 27 | | | | | | | |
| 7 | 5 | 5 | 0 | 28 | 4 | | | | | | |
| | 5 | 4 | 2 | 29 | 2 | 5 | | | | | |
8 | 7 | 3 | 3 | 1 | 30 | 4 | 6 | 7 | | | | |
| | 9 | 4 | 0 | 31 | 2 | 3 | 5 | 5 | 6 | 8 | 8 |
| 8 | 5 | 5 | 3 | 32 | 0 | 2 | 2 | 4 | 7 | 9 | |
| | 7 | 4 | 1 | 33 | 1 | 3 | 6 | 7 | | | |
| | | | | 34 | 3 | | | | | | |
| | | | 2 | 35 | 6 | | | | | | |
甲品種: | 271 | 273 | 280 | 285 | 285 | 287 | 292 | 294 | 295 | 301 | 303 | 303 | 307 |
| 308 | 310 | 314 | 319 | 323 | 325 | 325 | 328 | 331 | 334 | 337 | 352 | |
乙品種: | 284 | 292 | 295 | 304 | 306 | 307 | 312 | 313 | 315 | 315 | 316 | 318 | 318 |
| 320 | 322 | 322 | 324 | 327 | 329 | 331 | 333 | 336 | 337 | 343 | 356 | |
根據(jù)以上莖葉圖,對(duì)甲乙兩品種棉花的纖維長(zhǎng)度作比較,寫出兩個(gè)統(tǒng)計(jì)結(jié)論:
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