The median of the lower half of the observations when arranged in ascending order is the:
A) low median.
B) lower arithmetic mean.
C) first (lower) quartile.
D) third (upper) quartile.

Question

Quizplus · Accepted Answer

The first (lower) quartile is the point below which 25% of the observations in a data set fall when arranged in ascending order. The median of the lower half of the observations is another way of defining the first quartile. Therefore, choice C is the correct answer.

The Median of the Lower Half of the Observations When