ISDS 2000 Chapter : Chapter 9 Isds
15 Mar 2019
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Chapter 9: hypothesis tests: fundamentals of hypothesis testing (9. 1) dfsddsdss, examples 9. 1: the manager of a fast food restaurant wants to show that the average wait time for orders has changed. It corresponds to the status quo or the current belief in a situation: alternative hypothesis (h1) the opposite of the null hypothesis. It corresponds to what the researcher wants to prove. H1: 4. 5 company which produces gourmet popping corn is interested in determining whether or not a process is operating properly; namely that: example: suppose the manager of a microwave popcorn bags are filled at. 35 grams (2 tbls or 12. 5 cups of popped corn): hypothesis set [decision-making] We can never prove that the null is true, because we have only sample data. : forms of null and alternative. Nondirectional: ho: = o versus h1: o (2-tailed test, ho: o versus h1: > o (1-tailed test) In other words, there is a trade-off between the two possible types of error.
