Inferences on p class

Airline the defective rate on a manufacturing line is

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Unformatted text preview: mples: Examples: – More than 7% of the landings for a certain More airline exceed the runway. airline – The defective rate on a manufacturing line is The less than 10%. less – Our percentage of sales outside the United Our States is no longer 25%. States G. baker, Department of Statistics G. University of South Carolina; Slide 21 The Null and Alternative Hypotheses Null Hypothesis, Ho, represents what we Null represents assume to be true. It is always stated so as assume to to specify an exact value of the parameter. Alternative (Research) Hypothesis, H1 Alternative or Ha, represents the alternative to the null represents hypothesis and allows for the possibility of several values. It carries the burden of proof. It In most situations, the researcher hopes to disprove or reject the null hypothesis in favor of the alternative hypothesis. of G. baker, Department of Statistics G. University of South Carolina; Slide 22 Airline Exceedences Our research (alternative) hypothesis is that Our more than 7% of the landings for a certain airline exceed the runway. airline Let p = proportion exceeding runway H0: p < 0.07 Ha: p > 0.07 (not more than 7%) more (more than 7%) G. baker, Department of Statistics G. University of South Carolina; Slide 23 Null and Alternative Hypotheses We are trying to demonstrate that the defective rate on a manufacturing line is less than 10%. less We want to demonstrate that our percentage of sales outside the United States is no longer 25%. States G. baker, Department of Statistics G. University of South Carolina; Slide 24 Steps to a Hypothesis Test Determine the null and alternative Determine hypotheses. hypotheses. (2) Collect data and calculate test Collect statistic, assuming null hypothesis it true. true. (3) Assuming the null hypothesis is Assuming true, calculate the p-value. true, (4) Draw conclusion based on p-value. (1) G. baker, Department of Statistics G. University of South Carolina; Slide 25 Test Statistic Based on Test Normal Dis...
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This note was uploaded on 01/12/2014 for the course STA 509 taught by Professor Wang during the Fall '13 term at South Carolina.

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