Warm Up Write your height in centimeters on the board. Females on one side, Males on the other. Draw...
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Transcript of Warm Up Write your height in centimeters on the board. Females on one side, Males on the other. Draw...
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
Section 1.1Part 3
AP StatisticsObjective: To display quantitative variables using histograms.
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
Histograms
Histograms may be less useful than stemplots because you can’t see the actual data.
Histograms
Ranges for histograms generally include the lower end of the range, but does not include the upper end of the range
2010 x
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.
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
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
Using the TI-83 to make histograms
Turn the plot “on”, Choose the histogram
plot. Xlist should point to
the location of the data.
Using the TI-83 to make histograms
Under the “Zoom” menu, choose option 9: ZoomStat
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
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
Using the TI-83 to make histograms
Voila! Of course,
you can stillchange the ranges if youdon’t like the results.
Assignment
Read Pg. 18-30 Exercises 1.12 – 1.18, The Practice of
Statistics (Go back and read Pg.11-17 as review)