Question

The ______ is the median of of the lower half of the data set.

• A. quartile
• B. upper quartile
• C. range
• D. lower quartile

Answer 1

The correct option is D lower quartile

The lower quartile is the median of of the lower half of the data set.
Example: consider the data set: $10,20,30,40,50,60,70,80,90,100$
The median of the lower half of the data set is $10,20,30,40,50$
So, the lower quartile $=30$.