| | chela length (cm) | cephalothorax length (cm) | chela length (cm)/cephalothorax length (cm) | chela length (cm) | cephalothorax length (cm) | chela length (cm)/cephalothorax length (cm) |
| | males | males | males | females | females | females |
| | 3.2 | 4.3 | 0.744 | 3.2 | 4.3 | 0.744 |
| | 4.4 | 4.8 | 0.917 | 4.4 | 4.8 | 0.917 |
| | 4.7 | 5 | 0.94 | 4.7 | 5 | 0.94 |
| | 5.5 | 5.8 | 0.948 | 5.5 | 5.8 | 0.948 |
| | 4.1 | 4.8 | 0.854 | 4.1 | 4.8 | 0.854 |
| | 6 | 6 | 1 | 4.8 | 6.2 | 0.774 |
| | 5 | 5 | 1 | 4 | 5.6 | 0.714 |
| | 5 | 4.8 | 1.042 | 4.8 | 5 | 0.96 |
| | 4.5 | 4.8 | 0.938 | 4 | 5.5 | 0.727 |
| | 4.4 | 4.3 | 1.023 | 2.8 | 5.1 | 0.549 |
| | 4.3 | 5.2 | 0.827 | 3.7 | 5.9 | 0.627 |
| | 3.7 | 4.4 | 0.841 | 4.3 | 5.3 | 0.811 |
| | 5 | 5.5 | 0.909 | 4.4 | 5.9 | 0.746 |
| | 5.2 | 5.6 | 0.929 | 3.5 | 4.9 | 0.714 |
| | 6.5 | 5.6 | 1.161 | 3.7 | 5.2 | 0.712 |
| | 3.4 | 4.5 | 0.756 | 3 | 4.5 | 0.667 |
| | 5.1 | 5.2 | 0.981 | 4.7 | 5.5 | 0.855 |
| | 2.2 | 4.7 | 0.468 | 3.5 | 4.4 | 0.795 |
| | 5.4 | 5.4 | 1 | 2.7 | 4.6 | 0.587 |
| | 4.7 | 5.3 | 0.887 | 3.6 | 5.1 | 0.706 |
| | 5.5 | 6.5 | 0.846 | 4 | 6.5 | 0.615 |
| | 4 | 5 | 0.8 | 4.5 | 7 | 0.643 |
| | 5.5 | 6.5 | 0.846 | 4.5 | 6.5 | 0.692 |
| | 3.5 | 5 | 0.7 | 3.75 | 6 | 0.625 |
| | 4.5 | 7 | 0.643 | 4 | 6.5 | 0.615 |
| | 5.3 | 5.5 | 0.964 | 2.8 | 4.7 | 0.596 |
| | 3.9 | 4.3 | 0.907 | 3.6 | 5.1 | 0.706 |
| | 5.1 | 5.1 | 1 | 4 | 5.7 | 0.702 |
| | 4.7 | 4.8 | 0.979 | 4 | 5.6 | 0.714 |
| | 4.6 | 4.5 | 1.022 | 3.2 | 4.1 | 0.78 |
| | 3.85 | 4.5 | 0.856 | 4.3 | 5.3 | 0.811 |
| | 4.8 | 5.2 | 0.923 | 3.5 | 4.8 | 0.729 |
| | 3.8 | 4.4 | 0.864 | 5.9 | 6.3 | 0.937 |
| | 3.25 | 4.6 | 0.707 | 4.7 | 4.9 | 0.959 |
| | 2.1 | 4.4 | 0.477 | 3.1 | 5.4 | 0.574 |
| | 4.75 | 5.25 | 0.905 | 3 | 5.25 | 0.571 |
| | 5 | 5.5 | 0.909 | 4 | 5.5 | 0.727 |
| | 5.6 | 5.75 | 0.974 | 3.5 | 4.75 | 0.737 |
| | 4.25 | 4.25 | 1 | 3.5 | 5.6 | 0.625 |
| | 5.25 | 5 | 1.05 | 2.75 | 5.1 | 0.539 |
| | 3.8 | 5 | 0.75 | 3.4 | 4.9 | 0.694 |
| | 6 | 6.3 | 0.952 | 3.4 | 4.6 | 0.739 |
| | 4.4 | 5.2 | 0.846 | 3.3 | 4.6 | 0.717 |
| | 4.2 | 4.7 | 0.894 | 3.1 | 5.3 | 0.585 |
| | 3.6 | 3 | 1.2 | 3.1 | 5.3 | 0.585 |
| MEAN: | 4.5233333333 | 5.0722222222 | 0.8928666667 | 3.8288888889 | 5.3044444444 | 0.7236444444 |
| SD | 0.9237768326 | 0.7152999653 | 0.144628301 | 0.7256258184 | 0.6509453111 |
| P=0.05 |
| Null hypothesis = There is no difference in length between male chela and female chela. |
| Alternative hyptothesis = Male chela length is greater than female chela length. |
| | Chela Length Males vs Females T Test: Two-Sample Assuming Equal Variances | | | Cephalothorax Males vs Females T Test: Two-Sample Assuming Equal Variances |
| | | Males | Females | | Males | Females |
| | Mean | 4.5534090909 | 3.8431818182 | Mean | 5.0897727273 | 5.3272727273 |
| | Variance | 0.8315578753 | 0.5293710359 | Variance | 0.5093697146 | 0.4095877378 |
| | Observations | 44 | 44 | Observations | 44 | 44 |
| | Pooled Variance | 0.6804644556 | | Pooled Variance | 0.4594787262 |
| | Hypothesized Mean Difference | 0 | | Hypothesized Mean Difference | 0 |
| | df | 86 | | df | 86 |
| | t Stat | 4.0383686643 | | t Stat | -1.643396093 |
| | P(T<=t) one-tail | 0.0000582617 | | P(T<=t) one-tail | 0.0519761556 |
| | t Critical one-tail | 1.6627653893 | | t Critical one-tail | 1.6627653893 |
| | P(T<=t) two-tail | 0.0001165235 | | P(T<=t) two-tail | 0.1039523113 |
| | t Critical two-tail | 1.9879341663 | | t Critical two-tail | 1.9879341663 |
| | Ratio Chela/Cephalothorax Males vs Females T Test: Two-Sample Assuming Equal Variances |
| | | Males | Females |
| | Mean | 0.89625 | 0.7231818182 |
| | Variance | 0.0208767035 | 0.0139959197 |
| | Observations | 44 | 44 |
| | Pooled Variance | 0.0174363116 |
| | Hypothesized Mean Difference | 0 |
| | df | 86 |
| | t Stat | 6.1475385546 |
| | P(T<=t) one-tail | 0.0000000119 |
| | t Critical one-tail | 1.6627653893 |
| | P(T<=t) two-tail | 0.0000000239 |
| | t Critical two-tail | 1.9879341663 |
Bella edwards
CrayfishLab006S20191.xlsx
