A marketing firm is interested to know whether the median age of college students is 21 years. A sample of 80 college students is taken. Thirty of the students were under 21, 45 of the students were over 21, and 10 were 21 years old. The conclusion is that
A) the median age of college students is significantly different from 21.
B) the median age of college students is not significantly different from 21.
C) the median age of college students is significantly older than from 21.
D) the median age of college students is significantly younger than from 21.

Question

Quizplus · Accepted Answer

The median is the middle value when a data set is ordered from least to greatest. In this sample, the 40th and 41st values are the middle values, and since there are 10 students exactly 21 years old, the median falls within the age of 21, indicating no significant difference from 21.

A Marketing Firm Is Interested to Know Whether the Median