Chapter 9a Psyche

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Last updated 5:42 PM on 4/25/26
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8 Terms

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Statistical data analysis

process of collecting, organizing, summarizing, interpreting, and presenting data to answer research questions and support decision-making.

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Why statistics in research

  • Describe Data

  • Test Hypothesis

  • Generalize to Population

  • Estimate effect size

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Descriptive Statistics

Used to summarize and describe main features of data.

  • measures of central tendency

  • measures of dispersion

  • shape of distribution

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Types of descriptive statistics

  • central tendency

  • dispersion

    • good idea to do a visual examination of distribution before measuring tendency and dispersion

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Histogram

graph used to represent the frequency distribution of data measured on an interval or ratio scale (pg 138)

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Normal distribution

  • normally distributed data has a bell curve

  • also is symmetrical

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When to use bar chart

For nominal and ordinal variables

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Central tendency

Central tendency refers to a value that represents the center or typical value of a dataset, commonly measured using the mean, median, or mode.

  • ex. graph on 138 most frequently occurring values are around score 100