ch 2 sec 2

ch 2 sec 2 - Histograms,Frequency PolygonsandOgives...

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Histograms, Frequency  Polygons and Ogives Chapter 2 Section 2 1 September 29, 2010 Mr. Kenneth Horwitz
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Chapter 2 Frequency Distributions and  Graphs In your notes  Create a Frequency Distribution for  p. 61 #2 2
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2-2 Histograms, Frequency  Polygons, and Ogives 3 Most Common Graphs in Research 1. Histogram  2. Frequency Polygon  3. Cumulative Frequency Polygon (Ogive) 3
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2-2 Histograms, Frequency  Polygons, and Ogives The  histogram  is a graph that displays the data  by using vertical bars of various heights to  represent the frequencies of the classes. The class boundaries  are represented on the  horizontal axis. 4
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Histograms Construct a histogram to represent the data for the number of college of private colleges who only offer bachelors degrees. 5
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Histograms Class Limits Class Boundaries Frequency 70- 116 117 - 163 164 - 210 211 - 257 258 - 304 305 - 351 352 – 398   69.5 - 116.5 116.5 - 163.5 163.5 - 210.5 210.5 - 257.5 257.5 - 304.5 304.5 - 351.5 351.5 - 398.5 5 9 6 6 0 1 1 Histograms use class boundaries and  frequencies of the classes. 6
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A histogram is a vertical bar graph without spaces  in between the bars. Step 1 – Draw and label the x (horizontal) and y  (vertical) axis Step 2 – Label the x axis with the class boundaries  and the frequencies on the y axis. Using the frequencies as heights draw vertical bars 
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ch 2 sec 2 - Histograms,Frequency PolygonsandOgives...

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