We are asked to determine the percent of a data set is represented in .
We know that 1st quartile or lower quartile of a data set represents 25% of data points. Median represents 50% of data points and upper or 3rd quartile represents 75%of data points of a data set.
Therefore, 25% of a data set is represented by 1st quartile ().
Answer: "25%" . _________________________________________________________ 25% of a data set is represented in the "first quartile", known as: "Q1" . __________________________________________________________