PSYC 202 Lecture Notes - Lecture 3: Interquartile Range, Quartile, Standard Deviation

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15 Jun 2018

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WEEK 4

Descriptive statistics:

- Proportion for categorical

- Mean, median for numerical data

- Standard deviation, quartile, interquartile range

- Effect size (differences, ratios)

Graphing

- Frequency tables and bar graphs

- Histograms and box plots – when you have numerical data

- Scatter and line plots – when you have two pieces of data

- Graphing

When plotting and counting data record it in counts (raw data) not percentages

Marginal – summarizing rows and columns in each of the cells

Conditional can be rows or columns

Whisker goes on the last data point

Multiply IQR by 1.5, go down from the 1st quartile by 1.5

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