which of the following statements are true? question 16 options: the probability of type i error, alpha, is computed using the probability distribution of the test statistic when the null hypothesis is true. the probability of type ii error, beta, requires knowing the distribution of the test statistic when the null hypothesis is false. the probability of type i error, alpha, is computed by summing over probabilities of test statistic values in the rejection region. the probability of type ii error, beta, is computed by summing over probabilities of test statistic values in the complement of the rejection region. all of the statements are true.