Describing Data: Frequency Distributions, and Graphic ...

Describing Data: Frequency Distributions, and Graphic presentation The McGraw-Hill Companies, Inc. 2008 McGraw-Hill/IrwinChapter 2 Constructing a Frequency distribution Step 1: order data Step 2: The number of classes(k). A useful rule 2 to the k rule. such that2k> n, (n # of data )22> n, (n # of data ) Step 3: The class interval (i) or width. i (H-L)/k, i: interval, H: highest value, L: lowest value Step 4: starting value<=L, L:lowest value Step 5: make class and Frequency by starting from L then increase i and stop when you get k and count Frequency in each : The prices of 7 cars sold last week are: 5, 7, 5, 15, 12,7,8 Construct Frequency ditribution Solution:1. order(5,5,7,7,8,12,15) 2. then k=33.

Describing Data: Frequency Distributions, and Graphic Presentation McGraw-Hill/Irwin ©The McGraw-Hill Companies, Inc. 2008 Chapter 2. Constructing a Frequency Distribution Step 1: order data Step 2: The number of classes(k). A useful rule “2 to the k rule.” such that

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  Data, Chapter, Distribution, Presentation, Frequency, Graphics, Chapter 2, Describing, Frequency distributions, Describing data, And graphic presentation

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