Which of the following statements about hypothesis test is NOT true?
a) We should use a small significance level if type 1 error leads to more serious consequences than type 11 error.
b) It is generally harder to reject a two-sided hypothesis test than a one-sided hypothesis test
c) For a given sample, if we try to decrease type 1 error, then type ii error will increase.
d) The probability of rejecting the null hypothesis when the null hypothesis is false is the power of the test
