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Chapter 6 Hypothesis Testing

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Chapter 6 Hypothesis Testing Key words : Null Hypothesis H0, Alternative Hypothesis HA , Testing Hypothesis , test statistic , P-value Text Book : Basic Concepts and Methodology for the Health Sciences 2 Hypothesis Testing One type of statistical inference, estimation, was discussed in Chapter 5. The other type , Hypothesis Testing ,is discussed in this Chapter . Text Book : Basic Concepts and Methodology for the Health Sciences 3 Definition of a Hypothesis It is a statement about one or more populations. It is usually concerned with the parameters of the population. the hospital administrator may want to test the Hypothesis that the average length of stay of patients admitted to the hospital is 5 days Text Book : Basic Concepts and Methodology for the Health Sciences 4 Definition of Statistical Hypothesis They are Hypothesis that are stated in such a way that they may be evaluated by appropriate statistical techniques.

Z = -2.12 5.Decision Rule The alternative hypothesis is H A: μ ≠ 30 Hence we reject H 0 if Z > Z 1-0.025 = Z 0.975 or Z< - Z 1-0.025 = - Z 0.975 Z 0.975 =1.96(from table D) Text Book : Basic Concepts and Methodology for the Health Sciences 18

  Testing, Alternatives, Hypothesis, Hypothesis testing

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