UT Knoxville STAT 201 - Chapter 3 (34 pages)

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Chapter 3



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Chapter 3

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Pages:
34
School:
University of Tennessee
Course:
Stat 201 - Introduction to Statistics
Introduction to Statistics Documents

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Chapter 3 Chapter03 Presentation 1213 Displaying and Describing Categorical Data Copyright 2009 Pearson Education Inc 1 Types of Univariate Categorical Displays Frequency and Relative Frequency Table Bar Chart Pareto Chart Pie Chart Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 2 Frequency Tables The name of each category and the number of observations in each category Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 3 Relative Frequency Tables Similar but gives the percentages instead of counts for each category Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 4 Relative Frequency vs Percentage The table on the previous page may be called a relative frequency table but it is displaying percentages not relative frequencies Percentages will range from 0 to 100 Relative frequencies will range from 0 to 1 00 Frequency Relative Frequency First Second 325 285 0 1477 0 1295 14 77 12 95 Third Crew Total 706 885 2201 0 3208 0 4021 1 000 32 08 40 21 100 0 Class Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 5 Frequency Bar Chart A graphical display of the data in a frequency table Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 6 Relative Frequency Bar Chart A graphical display of the data in a relative frequency table Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 7 Output from JMP Software It is possible to get JMP software to display the frequency or the relative frequency bar chart Chapter03 Presentation 1213 Copyright 2009 Pearson Education Inc 8 Pareto Chart A bar chart with the bars put in order from the most frequently occurring category on the left to least frequently occurring category on the right is called a Pareto Chart Typically a Pareto Chart has a frequency scale on the left and a relative frequency scale on the right Sometimes a Pareto Chart contains a line above the bars indicating cumulative frequency and cumulative relative frequency Chapter03



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