having a hard time solving some of these extra credit and re

having a hard time solving some of these extra credit and review problems. hope you can help!

Which of the following statements are true 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 above statements are true.

Solution

OPTION B: The probability of type II error, Beta, requires knowing the distirbution of the test statistic wen the null hypothesis is false. [ANSWER, B]

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alpha is simply set/chosen; it is not calculated. So a and c are false.

Beta has something to do with the true distribution when the null hypothesis is false. So, d is not correct, because it didn\'t require knowing the true distirbution.