this is a item repeated at least twice from Qbank, can not understand the reason of the Ans… If Ho: p=0, Ha should be: a, Ha>0, / b, Ha<0, / c, Ha=0/ d, Ha not equal 0 the Ans is a, but I thought should be d, … How about your opinion about this?
should be d. h0: p=0 ha: p <> 0 ha: p > 0 would be if p <= 0 is the ho.
so the Qbank ans is wrong