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You NEED your book!!! Frequency Distribution

You NEED your book!!! Frequency Distribution. April 12, 2012. What is Frequency Distribution?. What is Frequency Distribution?. Retail Management Testing Scores. Frequency Distribution is a convenient system for organizing large amounts of data.

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You NEED your book!!! Frequency Distribution

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  1. You NEED your book!!!Frequency Distribution April 12, 2012

  2. What is Frequency Distribution?

  3. What is Frequency Distribution? Retail Management Testing Scores Frequency Distribution is a convenient system for organizing large amounts of data. • A number of classes determined, and all values in a class are tallied and grouped together • The most common way of displaying frequency distributions is by using a histogram • Histogram: a type of bar graph in which the width of each bar represents a class interval (the range of each class) and the height of the bar represents the frequency in that interval • Class Limits: the upper and lower values in each interval • Class Marks: the midpoints of the classes (the average of the upper and lower limits) Class interval Classes

  4. Example 1: The winning scores for the first 38 Super Bowls are:35, 33, 16, 23, 16, 24, 14, 24, 16, 21, 32, 27, 35, 31, 27, 26, 27, 38, 38, 46, 39, 42, 20, 55, 20, 37, 52, 30, 49, 27, 35, 31, 34, 23, 34, 20, 48, 32 • Find the range of the data b) Determine an appropriate class interval • Find the class marks d) Construct a frequency distribution of the data e) Draw a histogram of the data

  5. Example 1: The winning scores for the first 38 Super Bowls are:35, 33, 16, 23, 16, 24, 14, 24, 16, 21, 32, 27, 35, 31, 27, 26, 27, 38, 38, 46, 39, 42, 20, 55, 20, 37, 52, 30, 49, 27, 35, 31, 34, 23, 34, 20, 48, 32 f) What conclusions can you determine from the graph?

  6. Assignment: pg. 894 #10 & 11

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