http://www.ck12.org Chapter 7. Organizing and Displaying Data - Basic
There is an even number of data values so the median will be the mean of the two middle values.Med=^26 + 226 =26.
The median of the lower quartile is the number in the 8thposition which is 17. The median of the upper quartile is
also the number in the 8thposition which is 37. The smallest number is 6 and the largest number is 49.
The TI83 can also be used to create a box-and whisker plot. The five-number summary values can be determined by
using the trace function of the calculator.
Box-and-Whisker plots are very useful when two data sets need to be compared. The graphs are plotted, one above
the other, on the same number line. This method can be used to determine whether or not the additive, which the oil
company put in their premium gas, improved gas mileage.