Chapter 5

Question 1

normal distribution

Answer 1

A bell-shaped and symmetrical theoretical distribution with the mean, the median, and the mode all coinciding at its peak and with the frequencies gradually decreasing at both ends of the curve.

Question 2

standard (Z) score

Answer 2

The number of standard deviations that a given raw score is above or below the mean.

Question 3

standard normal distribution

Answer 3

A normal distribution represented in standard (Z) scores, with mean = 0 and standard deviation = 1.

Question 4

standard normal table

Answer 4

A table showing the area (as a proportion, which can be translated into a percentage) under the standard normal curve corresponding to any Z score or its fraction.