Section 9.3: Histograms and Box Plots

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Frequency and Histograms

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Presentation transcript:

Section 9.3: Histograms and Box Plots

Objective(s): By following instructions, students will be able to: Interpret and compare data sets using data displays.

Def: histogram is a bar graph that is used to display the frequence of data divided into equal intervals. The bars must: be of equal width Should touch, but not overlap.

explain 1A Create a frequency table from the data. Then use the frequency table to create a histogram. 39, 39, 42, 44, 46, 47, 47, 47, 48, 49, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 55, 55, 55, 55, 56, 56, 57, 57, 57, 58, 58, 58, 58, 58, 59, 59, 59, 59, 60, 60, 60, 60, 60, 60, 60, 61, 61, 62, 62, 62, 63, 63, 63, 63, 64, 64, 64, 64, 66, 66, 66, 67, 67, 67, 67, 67, 67, 67, 68, 68, 68, 68, 69, 69, 69, 70, 70, 70, 71, 71, 73, 73, 74, 74, 74, 75, 76, 76, 76, 76, 77, 77, 78, 86, 86, 86 Age Interval Frequency 30-39 40-49 50-59 60-69 70-79 80-89

explain 1B Listed are the scores from a golf tournament. 68, 78, 76, 71, 69, 73, 72, 74, 76, 70, 77, 74, 75, 76, 71, 74 Create a frequency table and histogram. Age Interval Frequency

Your-Turn #1 Listed are the heights of players, in inches, on a basketball team. Create a frequency table from the data. Then use the frequency table to create a histogram. 79, 75, 74, 68, 63, 76, 74, 73, 69, 65, 71, 68, 74, 73, 70

explain 2A Estimate the mean of the data set displayed in each histogram. The histogram shows the ages of teachers in a high school.

explain 2B Estimate the mean of the data set displayed in each histogram. The histogram shows the 2012 Olympic results for women’s weightlifting.

Your-Turn #2 The histogram shows the length, in days, of Maria’s last vacations. Estimate the mean of the data sets displayed in the histogram.

explain 3A Use the data to make a box plot. The numbers of runs scored by a softball team in 20 games are given. 3, 4, 8, 12, 7, 5, 4, 12, 3, 9, 11, 4, 14, 8, 2, 10, 3, 10, 9, 7

explain 3B Use the data to make a box plot. 13, 14, 18, 13, 12, 17, 15, 12, 13, 19, 11, 14, 14, 18, 22, 23

Revisit Objective(s): Did we… Interpret and compare data sets using data displays?

HW: Sec 9.3 pg 334 #s 1-11 ODD, 13-19