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Hypothesis testing Part 1

# Hypothesis testing Part 1 - Hypothesis Testing Part 1...

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2/28/2008 1 Hypothesis Testing Part 1 Reading Assignment: Chapter 8 Overview Definition xrhombus In statistics, a hypothesis is a claim or statement about a property of a population. xrhombus A hypothesis test (or test of significance) is a standard procedure for testing a claim about a property of a population. Rare Event Rule for Inferential Statistics If, under a given assumption, the probability of a particular observed event is exceptionally small, we conclude that the assumption is probably not correct.

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2/28/2008 2 Components of a Formal Hypothesis Test Null Hypothesis: H 0 xrhombus The null hypothesis includes the assumed value of the population parameter. xrhombus It must be a statement of equality. xrhombus Test the Null Hypothesis directly xrhombus Reject H 0 or fail to reject H 0 Alternative Hypothesis: H 1 xrhombus The alternative hypothesis (denoted by H 1 or H a ) is the statement that the parameter has a value that somehow differs from the null hypothesis. xrhombus , <, >
2/28/2008 3 Note about Forming Your Own Claims (Hypotheses) If you are conducting a study and want to use a hypothesis test to support your claim, the claim must be worded so that it becomes the alternative hypothesis. Note about Identifying H 0 and H 1 Example: Identify the Null and Identify the Null and Alternative Alternative Hypothesis. Hypothesis. Use

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