Distribution April 12 2012 What is Frequency Distribution 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 ID: 1027736
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1. You NEED your book!!!Frequency DistributionApril 12, 2012
2. What is Frequency Distribution?
3. 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 togetherThe most common way of displaying frequency distributions is by using a histogramHistogram: 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 intervalClass Limits: the upper and lower values in each intervalClass Marks: the midpoints of the classes (the average of the upper and lower limits)What is Frequency Distribution?ScoresFrequency60-7070-8080-9090-100910123Retail Management Testing ScoresClassesClass interval
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, 32Find the range of the data b) Determine an appropriate class interval Find the class marks d) Construct a frequency distribution of the datae) Draw a histogram of the dataWinning ScoreTalliesFrequency
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, 32f) What conclusions can you determine from the graph?
6. Assignment: pg. 894 #10 & 11