They are comparing early birds to night owls, and the amount of dreams they recall.
100 of each type recorded their dreams for a week.

For each group i have the mean, median, sd, and...
the proportion who recalled no dreams and the proportion who recalled 5 or more dreams.

I need to make 3 hypotheses tests. I dont have to figure them out, just state the pairs of hypotheses.

So far I have...

Ho: mean1 - mean2 = 0
Ha: mean1 - mean2 < 0

and

Ho: P1 - P2 = 0
Ha: P1 - p2 doesnt = 0

I cant figure out another way. Help!