Fighting Fish Data With Hormones

The table below shows the summary data for the time until a behavior is seen for all classes of behaviors. These data were pooled from the results of four groups of students. A Mann-Whitney test showed that there was no difference in the timing of the behaviors when control vs. dosed animals were compared. Notice, however, that the mean values for all of the control animals is less than the dosed animals (with the exception of membrane swelling). A Chi-square test to test the assumption that controls and means should have similar distributions of early- vs. late behaviors was significant (χ²= 4.50, p< 0.05).

Variable n mean standard dev     n mean standard dev
control       dosed      
approach 21 31.14 23.8 approach 21 37.38 53.9
pelvic 12 63.92 43.1 pelvic 13 76.46 92.6
ventral 14 99.07 64.8 ventral 12 112.75 82.3
caudal 10 118.30 70.7 caudal 11 123.00 79.2
dorsal 15 94.33 55.5 dorsal 13 106.54 53.1
operculum 11 131.82 66.5 operculum 10 138.60 74.9
membrane 10 152.30 67.5 membrane 7 90.14 64.8
body90 6 118.83 93.2 body90 4 177.50 24.8