With a directional hypothesis, if the research is incorrect in predicting the direction, the power can be as low as

a.Alphac. 1.0

b..70d. 0 (zero)

In hypothesis testing, if you commit type II error (retain the null when the null is false), you should probably do which of the following:

a.Decrease the alphac. Increase the N

b.Decrease the Nd. Make the hypothesis two-tailed

A small probability of something occurring by chance alone if some hypothesis is true leads you to

a.doubt the hypothesis

b.not doubt the hypothesis

c.doubt the theories of probability

d.both a and c