Question

A sociologist chose 300 students at random from each of two schools and asked each student how many siblings he or she has . The result are shown in the table below.

There are a total of 2,400 students at Lincoln School and 3,300 students at Washington School .
What is the median number of siblings for all the students surveyed ?
a)0
b)1
c)2
d)3

Answer 1

Answer: c

Explanation: The median value is defined as the "value in the midle of the set of data".

In this case, we have:

260 students with 0 siblings

190 students with 1

90 students with two

40 students with 3

20 students with 4

knowing that the total data set is 600 would be helpful to know the average of siblings, but for the median we need to see the number in the midle, that is 90, so the median amount of siblings will be 2, and the right option is c.