Classwork Fri 9/28

Today we did the assessment on Unit 1, Lesson 2, Measures of Center. Afterwards, we created a box and whisker plot (boxplot) and looked at the following vocabulary:

Percentile = A percentile is a value on a scale of one hundred that indicates the percent of a distribution that is equal to or below it.

Quartile = A quartile is any of the three values which divide the sorted data set into four equal parts, so that each part represents 1/4th of the whole data set

5-Number Summary

* Minimum = lowest data value
* Quartile 1, (Q1) = (25th Percentile) = lower quartile = cuts off lowest 25% of data
* Median, (Q2) = (50th Percentile) = middle value
* Quartile 3, (Q3) = (75th Percentile) = upper quartile = cuts off highest 25% of data, or lowest 75%
* Maximum = highest data value

the Interquartile Range (IQR) is the difference between the third and first quartiles

A percentile greater than 75 is considered above normal
A percentile between 25 and 75 is considered normal
A percentile less than 25 is considered below normal

the Range is the difference of the maximum and the minimum