A physiologist has the hypothesis that hormone X is important in producing sexual behavior. To investigate this hypothesis,20 male rats were randomly sampled and then randomly assigned to two groups....

A physiologist has the hypothesis that hormone X is important in producing sexual behavior. To investigate this hypothesis,20 male rats were randomly sampled and then randomly assigned to two groups. The animals in group 1 were injected with hormone X and then were placed in individual housing with a sexually receptive female. The animals in group 2 were given similar treatment except they were injected with a placebo solution. The number of matings were counted over a 20-minute period. The results are shown below
Hormone X: 8,10,12,6,6,7,9,8,7,11Placebo: 5,6,3,4,7,8,6,5,4,8