Chp3 - Module 3 Descriptive Measures Numerical Summaries...

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Numerical Summaries Module 3 Descriptive Measures Objectives : Be able to • calculate common numerical summaries of data • select appropriate numerical methods • describe the relationship between numerical summaries from datasets and the corresponding parameters of a population Statistics is the science of • collecting • organizing • summarizing • interpreting DATA for decision-making purposes.
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Population Key Characteristics Parameters Population Key Characteristics Parameters Sample Key Characteristics Statistics Organize / Summarize Data Organize / Summarize Data Graphical Graphical Numerical Numerical
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Key Features of Data Distributions •Shape • Typical Value •Spread •Out l iers First Principles Numerical summaries should quantify key characteristics of a data set At a minimum, we should include some measure of location (measure of center) and some measure of variation . Measures of Location / Center 1. Mean 2. Median 3. Mode 4. Trimmed Mean
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Measures of Location / Center 1.
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Chp3 - Module 3 Descriptive Measures Numerical Summaries...

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