Question

25, 8, 10, 35, 5, 45, 40, 30, 20
What is the lower quartile of the data set above?

Answer 1

25, 8, 10, 35, 5, 45, 40, 30, 20
put them in order from least to greatest
5, 8 , 10, 20, 25, 30, 35, 40, 45

lower quartile of the data set = (5+8+10+20) / 4 = 10.75

answer
10.75