What Does Statistics Have to Do with Psychology?

Descriptive Statistics: Summarizing Data

Tabular Summaries: Frequency Distributions

Pictures of Data: Histograms and Polygons

Central Tendency: Mean, Median, and Mode

Shapes of Distributions: Normal, Skewed, and Symmetrical

Variability: Range and Standard Deviation

Using the Mean and Standard Deviation to Make Comparisons: z-scores

Correlations

Inferential Statistics

Were the Observed Differences Due to Chance?

How Large Are the Observed Differences?