statistics
posted by josh on .
The test scores for 9 students on the Unit 1 test were 35, 25, 50, 95, 80, 60, 45, 100, and 90. What is the value of the second quartile for this data set?

put them in rank
25;35;45;50;60;80;90;95;100
Median 60, fourth quartile 92.5, second quartile 40 
After putting them in order of value, the second quartile = median (2/4 = 1/2). First quartile indicates the lowest 25%, while the third quartile indicates the highest 25%.