Unit 4 Stats Categorical Data

Variables

Characteristics of data that is recorded

Categorical

Names, categories, count # of occurrences

(Y/n, t/f, fav color)

Quantitative

Find an average

(Height weight ACT Score)

Bar graph

Shows actual count= Frequency

Or % (relative frequenc)

Side by side bar graph (sbs)

Comparing different groups

must use %

Segmented bar graph

Stacked sbs graph

-must use %

* if bars look exactly the same

“No association”

Bar graph

Use %

Adds to 100%

Two way table

shows data for 2 categorical variables

*marginal distribution+anything from the totals

*dnominator changes

for all categorical data

things can ONLY go in ONE category

conditional distribution

distribution only look @ one row/column