Question

Given the data set:

3 4 5 7 9 12 15 15 16 17
18 20 20 21 25 26 28 29 29 30 30
Using the exclusive method, what is
the value of the Lower Quartile (Q1)?
Write your answer with one decimal place.

Answer 1

The value of the Lower Quartile (Q1) is 15.

Step-by-step explanation:

The first quartile, Q1, is the median of the lower half of the data set. Since there are an odd number of values in the lower half, the middle value will be the first quartile.

Looking at the given data set, the seventh value, which is 15, represents Q1. Therefore, the value of the Lower Quartile (Q1) is 15.