Lect21_L6_L7_handout

Lect21_L6_L7_handout - lecture 21, Hypothesis Testing III z...

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Unformatted text preview: lecture 21, Hypothesis Testing III z Tests about a Population Mean: σ Known Review: Testing a “Greater Than” Alternative Review: Testing a “Less Than” Alternative Critical Value Rule Testing a “Not Equal To” Alternative p-value Approach A brief summary The Effect of Sample Size t Tests about a Population Mean: σ Unknown Hypothesis Tests about a Population Proportion lecture 21, Hypothesis Testing III Outline 1 z Tests about a Population Mean: σ Known Review: Testing a “Greater Than” Alternative Review: Testing a “Less Than” Alternative Testing a “Not Equal To” Alternative Critical Value Rule p-value Approach A brief summary 2 The Effect of Sample Size 3 t Tests about a Population Mean: σ Unknown 4 Hypothesis Tests about a Population Proportion lecture 21, Hypothesis Testing III z Tests about a Population Mean: σ Known Review: Testing a “Greater Than” Alternative Review: Testing a “Less Than” Alternative Critical Value Rule Testing a “Not Equal To” Alternative p-value Approach A brief summary The Effect of Sample Size t Tests about a Population Mean: σ Unknown Hypothesis Tests about a Population Proportion lecture 21, Hypothesis Testing III z Tests about a Population Mean: σ Known Review: Steps of Hypothesis Testing 1. State the null and alternative hypotheses 2. Specify the significance level α 3. Select a test statistic • Using a critical value rule: 4. Determine the critical value rule for deciding whether or not to reject H . Use the specified α to find the critical value 5. Collect the sample data and calculate the value of the test statistic 6. Decide whether to reject H by using the test statistic and the critical value rule • Using a p-value: 4. Collect the sample data and compute the value of the test statistic 5. Calculate the p-value by using the test statistic value 6. Reject H at level of significance α if the p- value is less than α 7. Interpret the statistical results in real-world terms and assess their practical importance lecture 21, Hypothesis Testing III z Tests about a Population Mean: σ Known Review: Testing a “Greater Than” Alternative Review: Testing a “Less Than” Alternative Critical Value Rule Testing a “Not Equal To” Alternative p-value Approach A brief summary The Effect of Sample Size t Tests about a Population Mean: σ Unknown Hypothesis Tests about a Population Proportion lecture 21, Hypothesis Testing III z Tests about a Population Mean: σ Known Review: Testing a “Greater Than” Alternative Review: Testing a “Greater Than” Alternative Using Critical Value Rule H : μ ≤ μ versus H a : μ > μ . • Modified hypotheses H : μ = μ versus H a : μ > μ ....
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This note was uploaded on 12/30/2009 for the course ISOM ISOM111 taught by Professor Anthonychan during the Fall '09 term at HKUST.

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Lect21_L6_L7_handout - lecture 21, Hypothesis Testing III z...

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