The two box plots show the scores from Mrs. Clark's first and second blocks on a 60 point assignment. What is the inter-quartile range for first block? http://curriculum.kcdistancelearning.com/courses/ALG1x-HS-A06/b/Exams/6Exam/6Exam_q41.bmp 35 15 30 10
The central rectangle (box) spans the first quartile to the third quartile. The interquartile range is the difference between the value of the third quartile and the value of the first quartile. |dw:1373332826105:dw| Can you find the values of the first and the third quartiles for the first block in the question?
@GreenBeanDemphsey Are you there?
yea im here my computer is messing up
Sorry abount your computer. The third quartile for the first block in the diagram for the question is 50. Can you find the value for the first quartile?
do you mean range @kropot72
Not the range yet. When you find the value for the first quartile, the range can be calculated by subtracting the value for the first quartile from the value for the third quartile (I already gave you the value for the third quartile).
If you look at the diagram for the question, what value on the scale is lined up with the left hand end of the upper box rectangle?
|dw:1373335237829:dw| To help you understand, in the diagram above which number on the scale is lined up with the first quartile?