View Full Document

18 views

Unformatted text preview:

Chapter 9 Hypothesis Testing Developing Null and Alternative Hypotheses Type I and Type II Errors Population Mean Known Population Mean Unknown Population Proportion 2006 Thomson South Western 1 Developing Null and Alternative Hypotheses Hypothesis testing can be used to determine wheth a statement about the value of a population param should or should not be rejected The null hypothesis denoted by H0 is a tentative assumption about a population parameter The alternative hypothesis denoted by Ha is the opposite of what is stated in the null hypothesis The alternative hypothesis is what the test is attempting to establish 2006 Thomson South Western 2 Developing Null and Alternative Hypotheses Testing Research Hypotheses The research hypothesis should be expressed as the alternative hypothesis The conclusion that the research hypothesis is tru comes from sample data that contradict the null hypothesis 2006 Thomson South Western 3 Developing Null and Alternative Hypotheses Testing the Validity of a Claim Manufacturers claims are usually given the bene of the doubt and stated as the null hypothesis The conclusion that the claim is false comes from sample data that contradict the null hypothesis 2006 Thomson South Western 4 Developing Null and Alternative Hypotheses Testing in Decision Making Situations A decision maker might have to choose between two courses of action one associated with the nu hypothesis and another associated with the alternative hypothesis Example Accepting a shipment of goods from a supplier or returning the shipment of goods to th supplier 2006 Thomson South Western 5 Summary of Forms for Null and Alternative Hypotheses about a Population Mean The equality part of the hypotheses always appears in the null hypothesis In general a hypothesis test about the value of a population mean must take one of the following three forms where 0 is the hypothesized value of the population mean H 0 0 H a 0 H 0 0 H a 0 H 0 0 H a 0 One tailed One tailed lower tail



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view ch09a and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view ch09a and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?