Now move the red distribution at the top to the right so that its mean is approximately 375 and then look at the middle and bottom distributions. Based on the location of 0 in the bottom distribution (meaning no difference in the means) what is the best conclusion? A mean difference of 0 is very likely and therefore the idea that the two groups are the same should be rejected. A mean difference of 0 is very unlikely and therefore the idea that the two groups are the same should not be rejected. A mean difference of 0 is very unlikely and therefore the idea that the two groups are the same should be rejected. A mean difference of 0 is very likely and therefore the idea that the two groups are the same should not be rejected