Statistics Ch 1

Individuals

objects described by the data, e.g. people, plants, animal
Variable

characteristic of individual, e.g. age, blood pressure, height, weight, eye color
Two types of variables:

Categorical & Quantitative
Categorical

falls into a category – cannot be added, e.g. color, gender
Quantitative
- can be counted or measured – can be added, subtracted, e.g.
- income
Charting categorical data

Bar graph & Pie chart
Bar graph

each category represented by a bar, record frequency for each category
pie chart

slices must represent the parts of one whole
Charting quantitative data (shape, center, spread)

histogram, stem plot, time plot
Histogram
- Choose the classes
- Count the individuals in each class
- Draw the histogram
Stem plot
- may be able to split stems
- Numerical histogram
- Note symmetry/ skewness; outliers
Time plot

time on the x-axis (horizontal)

Author

firefly501

137590

Card Set

Statistics Ch 1

Description

Picturing Distributions with Graphs Using graphs to describe data distributions

Updated

2012-02-25T16:45:13Z

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