Suppose we are testing the following hypotheses:
H0: It is not your friend's birthday
Ha: It is your friend's birthday
What constitutes a Type II error for these hypotheses?
a) Saying nothing when it is in fact their birthday.
b) Saying nothing when it isn't their birthday.
c) Saying Happy Birthday when it is in fact their birthday.
d) Saying Happy Birthday when it isn't their birthday.