1) Consider the following statements concerning the methodology of classical hypothesis testing:
A. The decision to reject the null hypothesis is made when the p-value is less than alpha.
B. The decision to reject Ho implies that the sample data used for the test must have been inappropriate and a different sample will always need to be re-selected.
C. When the level of significance is decreased for a test where Ha specifies that the value of the population parameter has decreased, then the critical value for the test also decreases.
only A is true
only A and B are true
only A and C are true
only B and C are true
all three statements are true
2) Which of the following is/are true?
Type I and Type II error probabilities are complements
Type I and Type II errors cannot both occur in one hypothesis test.
Type I and Type II error probabilities are conditional probabilities.
At least one of Type I or Type II errors must occur.