# Statistics Ch 1

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1. Individuals
objects described by the data, e.g. people, plants, animal
2. Variable
characteristic of individual, e.g. age, blood pressure, height, weight, eye color
3. Two types of variables:
Categorical & Quantitative
4. Categorical
falls into a category – cannot be added, e.g. color, gender
5. Quantitative
• can be counted or measured – can be added, subtracted, e.g.
• income
6. Charting categorical data
Bar graph & Pie chart
7. Bar graph
each category represented by a bar, record frequency for each category
8. pie chart
slices must represent the parts of one whole
9. Charting quantitative data (shape, center, spread)
histogram, stem plot, time plot
10. Histogram
• Choose the classes
• Count the individuals in each class
• Draw the histogram
11. Stem plot
• may be able to split stems
• Numerical histogram
• Note symmetry/ skewness; outliers
12. Time plot
time on the x-axis (horizontal)
 Author: firefly501 ID: 137590 Card Set: Statistics Ch 1 Updated: 2012-02-25 16:45:13 Tags: statistics Folders: Description: Picturing Distributions with Graphs Using graphs to describe data distributions Show Answers: