Lec. 19 – Hypothesis Testing: The Null and Types of Error.

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Presentation transcript:

Lec. 19 – Hypothesis Testing: The Null and Types of Error

How Science Works...

Example of a statistical test?

Components of the theory about testing statistical hypotheses about parameters of population distributions:

Description of Null and Alternative Hypotheses

Null hypothesis

Alternative hypothesis

Consequences of testing

Choice of estimators of parameters and test statistics

How the test statistic, z, works in the t-test

Significance levels and rejection or critical regions

Consequences of changing 

Types of Error and their Probabilities

Number of observations required for a test

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