STAT1051_lesson1

# STAT1051_lesson1 - Chapter 1 Descriptive Statistics...

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Chapter 1 Descriptive Statistics

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2 Contents Introduction Qualitative Data Frequency Distribution Graphical Methods Quantitative Data Graphical Methods Numerical Summary Box Plot
3 Qualitative Data Measurements that cannot be measured on a natural numerical scale Observations can be classified into one of a group of categories Examples: a) Political affiliation (Democrat, Republican, etc) b) Rating of a service (excellent, good, poor etc.) c) Race d) Gender

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4 Summarizing Qualitative Data Tabular Summary Frequency Distribution Relative Frequency Distribution Graphical Summary Bar Chart Pie Chart
5 Frequency Distribution A FREQUENCY DISTRIBUTION is a tabular summary of data showing different classes and the frequency (or number) of items in each of several non-overlapping classes. It shows how the observations in the sample are distributed The objective is to provide insights about the data that cannot be quickly obtained by looking only at the original data.

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6 Example 1.0
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## This note was uploaded on 11/27/2011 for the course STAT 1051-10 taught by Professor Balaji during the Fall '11 term at GWU.

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STAT1051_lesson1 - Chapter 1 Descriptive Statistics...

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