Part A: Match the correct term to each of the following descriptions. A term may be used more than once or not at all.

Descriptions:

1. The number of standard deviations that a value lies from the mean
2. The sum of a set of values divided by the number of values
3. A probability distribution around a central value, dropping off symmetrically to the right and left, forming a bell-like curve
4. A measure of variation from the mean

Terms:

a) mean

b) standard deviation

c) z-score

d) normal distribution

e) relative frequency

f) normal cumulative distribution

Part B: If X~ (50,52), draw a diagram that represents the percent of data that have the value for when 35 < x < 55