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## Types of Graphs

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**FREQUENCY CHART**A table that lists each data item with its frequency.**LINE PLOT**Used to display data by placing an “x” for each response along a number line.**BAR GRAPH**A graph used when comparing amounts. (parts to parts)**LINE GRAPH**A graph used to show changes over time.**HISTOGRAM**A type of bar graph that displays the data in intervals.**WeeklyTV Viewing**60 40 Number of People 20 0-2 3-5 6-8 Hours**HISTOGRAM**Calories of Soup-in-a-Cup**LINE PLOT**The following grades were made on the last test. Display them in a line plot. 7 26 13 85 54 98 9**CIRCLE GRAPH**A graph used to show parts of a whole.**SCATTERPLOT**A graph used to show that there is a relationship between two different sets of information.**Arm Span verses Height**• Measure your height in inches • Measure the distance of your arm span. • Record the data in your graphing calculator in List 1 for arm span, List 2 for height.**Box and Whisker**• Shows the distribution of data along a number line • Related to medians, which divide data into two equal parts • Good to make comparisons between items**Box and Whisker Plots**1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31**Measures of Variation**• Are used to describe distribution of data.**Quartiles**• Values that divide a set of data into four equal parts. • **Remember that the Median separates a set of data in two equal parts**Lower & Upper Quartiles**• The median of the lower half of a set of data is the lower quartile or LG • The median of the upper half of a set of data is the upper quartile or UQ.**Interquartile Range**• This is the range of the middle half of the data. It is the difference between the upper quartile and the lower quartile.**Outliers: data that is more than 1.5 times the value of the**interquartile range beyond the quartiles**Box and Whisker Plots**Interquartile Range Lower Quartile Upper Quartile 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31**Four Color Activity for Box and Whisker Plots**• Sort the four color cards into groups where you have a match of statistics, data, graph, conclusion. • Record your groups on the recording sheet.**Stem and Leaf Plot**• Shows data items in order**What type of graph would be best for the following types of**data?**According to the U.S. Department of the Interior, 997**species of the world’s animals are endangered.**Find the median of the finishing times (in seconds) for the**100-meter dash at a recent track meet.