1. Answer the following three questions. (15 points) (1) Please define or draw a figure representing population distribution, sample distribution, and sampling distribution (5 points) (2) Please define, compare and contrast the standard deviation and standard error. (5 point) (3) Although you can compute a z-score for a single score (a sample of n=1), it is impossible to compute at statistic for a sample that has only one score. Explain why . (5 point)