For each pair of hypotheses that follows, decide whether H and H are set up correctly as the null and alternative hypotheses for a hypothesis test. If so, select "Valid" from the drop down menu. If not, select "Invalid".

1	H: = 81		2	H: M = 239
	H: 81			H: M 239

3	H: = 21		4	H: = 117
	H: 21			H: 116

You evaluate the by assuming that it is true and testing the reasonableness of this assumption by calculating the probability of getting the results if chance alone is operating.