Testing a Claim Chapter 11/12. Significance Tests: The Basics Section 1.

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Presentation transcript:

Testing a Claim Chapter 11/12

Significance Tests: The Basics Section 1

Reasoning of Significance Tests  Significance Test: a formal procedure for comparing observed data with a hypothesis whose truth we want to assess  In plain English, an outcome that would rarely happen if a claim were true is good evidence that the claim is not true.  Hypothesis: A statement about the parameters in a population or model.  The results of a test are expressed in terms of probability that measures how well the data and the hypothesis agree.

Stating Hypotheses

Interpreting P-Values

Statistical Significance

Job Satisfaction Continued

Type I and Type II Errors

The Power of a Statistical Test

Tests about a Population Proportion Section 9.2

Significance Tests: 4 Steps

Potato Example Cont.

Calculating Shortcuts and Exam Tips….

Two Sided Tests

Tests about Population Mean Section 9.3

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