warm up write your height in centimeters on the board. females on one side, males on the other. draw...
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Warm Up
1. Gather data from 15 people in class regarding the ages of each of their siblings.
2. Record the distribution of their ages in a dot plot.
3. Describe the distribution’s center, shape, and spread. Are there any outliers?
Compare your solutions from the homework
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Section 1.1Part 3
AP StatisticsObjective: To display quantitative variables using histograms.
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Histograms
Each row of a stemplot represents a number of data points found in a range. What kind of ranges might a stemplot have?
Histograms have the same general idea, but histograms are more flexible in terms of the ranges.
Ranges have equal width
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Histograms
Histograms may be less useful than stemplots because you can’t see the actual data.
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Histograms
Ranges for histograms generally include the lower end of the range, but does not include the upper end of the range
2010 x
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Using the TI-83 to make histograms
The TI-83 can be used to make histograms, and will allow you to change the location and widths of the ranges.
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Using the TI-83 to make histograms
Start by entering data into a list
Example: Enter the presidential data from page 19 into any list; in this case, we will use L1
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Using the TI-83 to make histograms
Choose 2nd:Stat Plot to choose a histogram plot
Caution: Watch out for other plots that might be “turned on” or equations that might be graphed
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Using the TI-83 to make histograms
Turn the plot “on”, Choose the histogram
plot. Xlist should point to
the location of the data.
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Using the TI-83 to make histograms
Under the “Zoom” menu, choose option 9: ZoomStat
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Using the TI-83 to make histograms
The result is a histogram where the calculator has decided the width and location of the ranges
You can use the Trace key to get information about the ranges and the frequencies
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Using the TI-83 to make histograms
You can change the size and location of the ranges by using the Window button
Press the Graph button to see the results
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Using the TI-83 to make histograms
Voila! Of course,
you can stillchange the ranges if youdon’t like the results.
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Assignment
Read Pg. 18-30 Exercises 1.12 – 1.18, The Practice of
Statistics (Go back and read Pg.11-17 as review)