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PSY 230, Jacobs

Welcome to PSY 230Introduction to Statistics

Elizabeth Jacobs, Ph.D.

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PSY 230, Jacobs

Definitions Statistics Population Sample Parameter Statistic Data Raw score Variable Constant

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PSY 230, Jacobs

Two Types of Statistics

Descriptive Inferential

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PSY 230, Jacobs

Scales of Measurement:

NominalOrdinal IntervalRatio

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PSY 230, Jacobs

Scientific Method

Hypothesis Variables Subjects Groups Treatment, no treatment Observation Data Reduction Inferential statistics

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PSY 230, Jacobs

Statistical Notation:

Solve: X2, X, XY, X2, (X)2, XY, X+4

X, XY, X2, (X)2, (X+Y), (X+4), XY

Y 45523

X32273

X2 XY X+4