Your null hypothesis is that there is no difference between the mean of two groups. In doing a test of statistical significance between samples, you will have made a Type I error if you conclude that: O Cannot be determined from the information given O Any difference in the samples is due to chance O There is no difference between means in the population when in fact there is a difference There is a difference between means in the population when in fact there is no difference O The absence of a difference in the samples is due to chance Question 9 3 pts Let two events (both with probability greater than 0) be mutually exclusive. That means if one happens, the other cannot happen. Then it must be true that: O They also could be independent They cannot be independent O They must be the same event O They also must be independent