Ch3_DescribingData

# Ch3_DescribingData - Chapter3 DescribingData:Frequency...

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Chapter 3 Describing Data: Frequency  Distributions and Graphs

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Data Data are the scores of measurements of behavior or  characteristics obtained from observation.   This may consist of  numbers words , or  images .  In  general, data are  measurements  or observations of a  set of  variables .
Raw Data Raw data, or raw scores, refer to numeric values  collected from your subjects, or study participants.  61 57 60 62 68 59 62 59 64 60 59 67 55 65 63 59 67 60 59 64

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Frequency Distribution We usually like to have a clear and systematic way to  present the data we collected. Frequency distribution is a table showing a set of ordered  scores and how frequently each score occurred.
Ungrouped Frequency Distribution A frequency distribution constructed by listing all possible  score values between the lowest and highest scores  obtained, and then placing a tally mark beside a score  each time it is repeated.

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Raw Data Set 1 61 57 60 62 68 59 62 59 64 60 59 67 55 65 63 59 67 60 59 64 Link to EXCEL file Largest score: 68 Smallest score: 55 Link to EXCEL file Largest score: 68 Smallest score: 55
Ungrouped Frequency Distribution Score Tally  Freq. Relative Freq. % Freq. 68 67 66 65 64 63 62 61 60 59 58

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Ungrouped Frequency Distribution Score Tally  Freq. Relative Freq. % Freq. 68 / 67 // 66 65 / 64 // 63 / 62 // 61 / 60 /// 59 ///// 58
Ungrouped Frequency Distribution Score Tally  Freq. Relative Freq. % Freq. 68 / 1 67 // 2 66 0 65 / 1 64 // 2 63 / 1 62 // 2 61 / 1 60 /// 3 59 ///// 5 58 0

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The frequency of a score divided by the total number of  scores obtained. rf
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## This note was uploaded on 11/30/2009 for the course HP 400m at USC.

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Ch3_DescribingData - Chapter3 DescribingData:Frequency...

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