A random sample of n = 4 scores is obtained from a normal population with m = 30 and s = 8. what is the probability that the sample mean will be smaller than m = 22? 0.00003 0.0228 0.1587 0.3085

A repeated-measures study using a sample of n = 20 participants would A set of n = 25 pairs of scores (X and Y values) has a Pearson correlation of r = 0.80. How much of the variance for the Y scores is predicted by the relationship with X?0.64 or 64%