Posted by josh on Saturday, February 26, 2011 at 4:18pm.
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?

statistics  bobpursley, Saturday, February 26, 2011 at 8:03pm
put them in rank
25;35;45;50;60;80;90;95;100
Median 60, fourth quartile 92.5, second quartile 40

statistics  PsyDAG, Sunday, February 27, 2011 at 11:17am
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%.
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