1. A parameter refers to a sample characteristic.

a) True

b) False

2. Which of the following defines standard deviation?

a) The difference between the highest and lowest values

b) The arithmetic average of a set of values

c) The average difference between a set of values and the mean

d) The average of the highest and lowest values in a set

3. Calculating the median requires data of at least what scale?

a) Nominal

b) Ordinal

c) Interval

d) Ratio

4. The z-score indicates where an individual data value lies within the data set.

a) True

b) False

5. The tails of a normal distribution never touch the abscissa.

a) True

b) False