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Welcome to PSY 230 Introduction to Statistics

Welcome to PSY 230 Introduction to Statistics. Elizabeth Jacobs, Ph.D. Definitions. Statistics Population Sample Parameter Statistic Data Raw score Variable Constant. Two Types of Statistics. Descriptive Inferential. Scales of Measurement:. Nominal Ordinal Interval Ratio.

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Welcome to PSY 230 Introduction to Statistics

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  1. Welcome to PSY 230Introduction to Statistics Elizabeth Jacobs, Ph.D.

  2. Definitions • Statistics • Population • Sample • Parameter • Statistic • Data • Raw score • Variable • Constant

  3. Two Types of Statistics • Descriptive • Inferential

  4. Scales of Measurement: • Nominal • Ordinal • Interval • Ratio

  5. Scientific Method • Hypothesis • Variables • Subjects • Groups • Treatment, no treatment • Observation • Data Reduction • Inferential statistics

  6. Statistical Notation: Solve: X2, X, XY, X2, (X)2, XY, X+4 X, XY, X2,(X)2,  (X+Y),(X+4), XY X 3 2 2 7 3 Y 4 5 5 2 3 X2 XYX+4

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