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Section 1.1 Part 3

Section 1.1 Part 3. AP Statistics September 5, 2008 CASA. 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.

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Section 1.1 Part 3

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  1. Section 1.1Part 3 AP Statistics September 5, 2008 CASA

  2. 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

  3. Histograms • Histograms may be less useful than stemplots because you can’t see the actual data.

  4. Histograms • Ranges for histograms generally include the lower end of the range, but does not include the upper end of the range

  5. 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.

  6. 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

  7. 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

  8. Using the TI-83 to make histograms • Turn the plot “on”, • Choose the histogram plot. • Xlist should point to the location of the data.

  9. Using the TI-83 to make histograms • Under the “Zoom” menu, choose option 9: ZoomStat

  10. 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

  11. 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

  12. Using the TI-83 to make histograms • Voila! • Of course,you can stillchange the ranges if youdon’t like the results.

  13. Assignment • Exercises 1.12 – 1.18, The Practice of Statistics

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