Answer
The conclusion is not justified. It lacks proper data analysis.
Work Step by Step
The experiment does not identify an experimental and control group. The dark-model mice are not defined as to which habitat of mice they resemble; since the two habitats are different (inland and beach), their camouflage is likely to be different. Thus an experimental group of non-native camouflage and a control group of native camouflage must be established, just like the example in module 1.5.
Furthermore, it is not the total number of attacks the dark mice models underwent that must be noted but the rate of attacks as compared to the other models. This is because one of the environments might have a higher number of attacks because of the presence of more predators, while the rate of attacks on the dark models stay the same and do not disprove the hypothesis.