GRE (Graduate Record Examinations) Psychology Measurement and Methodology-Statistical Procedures Study Material (Page 8 of 24)

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Application of Statistics in Psychology

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Application of Statistics in Psychology

  • In study of abnormal psychology
  • In personality test
  • In psychological tests
  • In psychometrics
  • In learning theory
  • In perception
  • In human development

Statistics allow us to answer these kinds of questions. Statistics allow psychologists to:

  • Organize data: When dealing with an enormous amount of information, it is all too easy to become overwhelmed. Statistics allow psychologists to present data in ways that are easier to comprehend. Visual displays such as graphs, pie charts, frequency distributions, and scatterplots allow researchers to get a better overview of data and look for patterns they might otherw…

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Class Interval: Types of Class Intervals

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In the examples above number of hours studied were treated individually. Sometimes, depending on range of data the data might have to be grouped and analyzed in intervals. For example, we might study the number of hour՚s studies in 5 intervals:

Inclusive Class Interval
Hours StudiedFrequencyCumulative Frequency
1 - 233
3 - 4912
5 - 61527
7 - 8936
9 - 10440

Types of Class Intervals

Based on how we divide the data into classes, class intervals can be of following types:

  • Inclusive Class Interval: In such an interval, upp…

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