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7 Math Ch. 2

Statistics: Analyzing Data

bar graph a graphic form using bars to make comparisons of statistics
box-and-whisker plot a diagram that summarizes data using the median, the upper and lower quartiles, and the extreme values
cluster data that are grouped closely together
data pieces of information, often numerical, which are gathered for statistical purposes
frequency table a table for organizing a set of data that showers the number of pieces of data that fall within given intervals or categories
histogram a special kind of bar graph in which the bars are used to represent the frequency of numerical data that have been organized in intervals
interquartile range the range of the middle half of a set of numbers
interval on a scale, the difference between the greatest and least values in each category
leaf the second greatest place value of data in a stem-and-leaf plot
line graph a type of statistical graph using lines to show how values change over a period of time
line plot a diagram that shows the frequency of data, an X is placed above a number on a number line each time that number occurs in a set of data
lower extreme the least number of a set of data
lower quartile the median of the lower half of a set of numbers indicated by LQ
mean the sum of the data divided by the number of items in the data set
measures of central tendency numbers that are used to describe the center of a set of data including the mean, median, and mode
median the middle number in a set of data when arranged in numerical order
mode the number or numbers that appear most often in a set of data
outlier a piece of data that is quite separated from the rest from the rest of the data
range the difference between the greatest and least numbers in a data set
scale the set of all possible values of a given measurement, including the least and greatest numbers in the set, separated by equal intervals
scatter plot two sets of related data are plotted as ordered pairs on the same graph
statistics the study of collecting, organizing, and interpreting data
stem the greatest place value common to all the data values is used in a stem-and-leaf plot
stem-and-leaf plot a system used to condense a set of data where the greatest place value of the data forms the stem and the next greatest place value form the leaves
upper extreme the greatest number of a set of data
upper quartile the median of the upper half of a set of numbers, indicated by UQ
Created by: Miss Brinkoetter