Box-and-Whisker Plots About this Lesson This is a foundational lesson for box-and-whisker plots (boxplots), a graphical tool used ... and compare dotplots (line plots., stemplots, bar graphs, histograms, and boxplots. The five numbers that make up a box-and-whisker plot are called the . The median (second quartile) divides the data set into two halves. Draw a vertical line above the value of Q3, this forms the right end of the box. The notches are constructed using the formula: this forms the left end of the box. Draw a box plot for this information. Extend the “right whisker” to the maximum value. 7. a. Draw a box plot for this information. into a small project by having students collect data which interests them and then write a comparison of the data to turn in to the teacher or to present to the class. 282 Chapter 7 Data Analysis and Displays 7.2 Lesson Lesson Tutorials Key Vocabulary box-and-whisker plot, p. 282 quartiles, p. 282 Box-and-Whisker Plot A box-and-whisker plot displays a data set along a number line using medians. Create a box and whisker plot using this data: 77, 99, 112, 85, 117, 68, 63. ! Store A’s box and right whisker are longer than Store B’s. (Total for question 2 is 2 marks) Range Lower Quartile Median Upper Quartile Maximum Give a descriptive title to the graph. Store A’s median is about 43, and Store B’s is about 51. Draw a vertical line above the value of the median and complete the box. Compare the shapes of the box plots. 5. Extend the “left whisker” to the minimum value. 6. Example 2: Use data set from Example 1 to calculate the minimum, LQ, UQ, maximum, range, and IQR. Then, construct a box-and-whisker plot with an ACCURATE number line! 3. Page 2 of 6 Reference the picture below to see how a data set is separated into halves. (200_07.GD_D.01) Create, interpret, and compare dotplots (line plots., These are the mimimum, Q1, Median, Q 3, and maximum values. A box-and-whisker plot is one way to represent the data visually. shown at the right. (1) The median income for nuclear engineers is greater than the income of all musicians. Example: The numbers of first cousins of the students in a ninth-grade class are . Box plots are often used for comparing the distributions of several groups of data, since they summarize the center and spread of the data very nicely. (Total for question 1 is 2 marks) Minimum Lower Quartile Median Upper Quartile Maximum 11 28 37 42 51 2 The table shows some information about the weights, in grams, of some potatoes. The box plots show the distribution of the number of team wristbands sold daily by two different stores over the same time period. 7) The accompanying box-and-whisker plots can be used to compare the annual incomes of three professions. 11,12,12,13,14,14,14,16,18 Store A’s median - The _____ are the same for both tests. Based on the box-and-whisker plots, which statement is true? Show all 4 steps and work neatly below. Compare the centers of the box plots. When making comparisons among the locations (medians) of various batches, a modified box pl ot called the notched box plot is useful. The box-and-whisker plots below show a class’ test scores for two tests.What conclusions can you make? 4. Name _____ Date _____ Tons of Free Math Worksheets at: © www.mathworksheetsland.com Topic: Box and Whisker Plot- Worksheet 1 ANSWERS 1. The Box-and-Whisker Plots lesson from the LTF Middle Grades Guide will provide a good resource for preparing to teach this lesson. 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