Unpaired two-sample T-test or more?

Alright. I'll use three behaviors as a examples, although there are six behaviors with the same question.

1) Is the frequency of behavior A significantly different between group one (20 species) and group two (12 species)?

Group one: 0.00, 0.50, 0.69, 0.04, 2.64, 0.28, 0.13, 0.11, 0.13, 0.20, 0.13, 0.06, 0.04, 0.50, 0.00, 0.19, 0.03, 0.00, 0.25, 0.68

Group two: 0.95, 2.84, 0.39, 1.13, 1.29, 1.32, 0.81, 1.50, 1.38, 0.25, 1.31, 1.94

(Scores represent instances of behavior A per individual per hour.)

2) Is the frequency of behavior B significantly different between group one and group two?

Group one: 0.81, 3.50, 1.19, 1.71, 1.93, 1.44, 0.63, 0.19, 1.13, 1.55, 0.25, 0.63, 0.46, 0.88, 1.13, 0.50, 0.25, 0.06, 1.75, 2.25

Group two: 4.14, 4.41, 6.20, 1.75, 1.63, 2.93, 1.06, 2.21, 1.63, 1.88, 1.44, 2.63

3) Is the frequency of behavior C significantly different between group one and group two?

Group one: 0.00, 0.00, 0.00, 0.00, 0.00, 0.03, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00

Group two: 0.36, 1.98, 1.84, 0.50, 3.00, 0.80, 0.25, 0.29, 0.58, 0.81, 0.06, 0.06

...and so on for six behaviors. Obviously for behavior C, there is a significant difference, and stats aren't really needed.

Regarding the behavior frequency scores: Group sizes of the observed species varied. Some species are rare in captivity while others are not. In the case of solitary species, multiple individuals were studied separately. Basically I observed as many individuals as I could given the limitations of captivity and my travel budget. I tried to maximize the length of the observations by observing each group for 8 hours at various times of the day. Over 330 hours of observation time were logged for the study.

/r/AskStatistics Thread Parent