**TI83F* AppVariable file 04/07/08, 22:10ç ÖMC311ÖÔnav 15AE5038CD7BC43F0F776BA12CEABBAFMC311.MC3111  box-and-whisker plotjbox-and-whisker plot:ÖA diagram that divides a set of data into four parts using the median and quartiles.  circle graphYcircle graph:ÖA graph that compares parts of a set of data as a percent of the whole set.  histogramhistogram:ÖA bar graph in which the data are organized into equal intervals. The height of the bar represents the frequency in that interval. interquartile range~interquartile range:ÖThe difference between the upper and lower quartiles representing the middle half of the data in the set. lower quartileMlower quartile:ÖDivides the lower half of a set of data into two equal parts. meanamean:ÖThe sum of the numbers in a set of data divided by the number of pieces of data in the set. measure of central tendency]measure of central tendency:ÖA number or piece of data that represents the whole set of data. measure of variationYmeasure of variation:ÖA measure that describes the spread of the values in a set of data.  median«median:ÖThe middle number in a set of data when the data are arranged in numerical order. If the data has an even number, the median is the mean of the two middle numbers.  modeGmode:ÖThe number(s) or item(s) that appear most often in a set of data.  outlieroutlier:ÖAny element of a set of data that is at least 1.5 interquartile ranges less than the lower quartile or greater than the upper quartile.   quartilesBquartiles:ÖValues that divide a set of data into four equal parts.  range of a data setfrange of a data set:ÖThe difference between the greatest number and the least number in a set of data. stem-and-leaf plotŒstem-and-leaf plot:ÖA display of data in which each piece of the data is separatedÖinto two numbers that are used to form a stem and a leaf. upper quartile6upper quartile:ÖThe median of the upper half of a set.¨