Chapter 2 for Stats

Chapter 2 for Stats - Chapter 2 Organizing and Displaying...

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Chapter 2 Organizing and Displaying Data
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Chapter Two Broad-Based learning goal Describe different methods for organizing and displaying data, and explain why these procedures are useful and important in research and statistics.
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Three Types of Distribution Tables Rank Order Distribution Simple Frequency Distribution Grouped Frequency Distribution
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Rank Order Distribution ordered listing of the data in a single column Use: N ≤ 20 Makes it easy to see the highest and lowest scores Range: R = H – L; (H=highest score, L=lowest score)
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Create a rank order distribution for the lengths of young-of-the-year freshwater drum (in mm) caught near Rattlesnake Island in Lake Erie: 79, 77, 65, 78, 71, 66, 95, 86, 84, 83, 88, 72, 81, 64, 71, 58, 60, 81 Rank Order Distribution: 58 60 64 65 66 71 71 72 77 78 79 81 81 83 84 86 88 95
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Simple Frequency Distribution ordered listing of variable being studied (X), with a frequency column (f) indicating # of cases at each given value of X Usage: N > 20, R ≤ 20 Allows larger data set to be condensed (i.e. on one sheet of paper)
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Construct a simple frequency distribution for the following low temperatures recorded at Phoenix Sky Harbor Airport: 46, 43, 54, 53, 43, 42, 47, 46, 46, 45, 43, 39, 52, 51, 48, 42, 43, 47, 49, 54, 53, 45, 50, 52, 53, 49, 35, 34 Example
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SPSS Output temp 1 3.6 3.6 3.6 1 3.6 3.6 7.1 1 3.6 3.6 10.7 2 7.1 7.1 17.9 4 14.3 14.3 32.1 2 7.1 7.1 39.3 3 10.7 10.7 50.0 2 7.1 7.1 57.1
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Chapter 2 for Stats - Chapter 2 Organizing and Displaying...

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