建立两个var:
| body length |
sex |
| 281 |
1 |
| 365 |
1 |
| 256 |
1 |
| 278 |
1 |
| 318 |
1 |
| 374 |
1 |
| 269 |
1 |
| 343 |
1 |
| 278 |
1 |
| 284 |
1 |
| 302 |
1 |
| 293 |
1 |
| 286 |
1 |
| 391 |
1 |
| 290 |
1 |
| 243 |
1 |
| 272 |
1 |
| 283 |
1 |
| 307 |
1 |
| 265 |
1 |
| 291 |
1 |
| 296 |
1 |
| 282 |
1 |
| 319 |
1 |
| 276 |
1 |
| 245 |
2 |
| 404 |
2 |
| 440 |
2 |
| 435 |
2 |
| 562 |
2 |
| 204 |
2 |
| 225 |
2 |
| 451 |
2 |
| 243 |
2 |
| 258 |
2 |
| 271 |
2 |
| 333 |
2 |
| 263 |
2 |
| 263 |
2 |
| 193 |
2 |
| 297 |
2 |
| 515 |
2 |
| 481 |
2 |
| 468 |
2 |
| 452 |
2 |
| 487 |
2 |
| 292 |
2 |
| 280 |
2 |
| 358 |
2 |
| 287 |
2 |
| 271 |
2 |
| 258 |
2 |
| 402 |
2 |
| 442 |
2 |
| 408 |
2 |
| 411 |
2 |
| 415 |
2 |
Anaylze--〉compare means--> independent samples t test
p value<0.05 ==> two sample means are significantly different from each other.
所以雌雄鱼的平均体长是不同的。 | 
发表于 2009-9-17 15:36
| 