Chapter 6 Hypothesis Testing - University of Pittsburgh
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. e.g. 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.
There are two hypotheses involved in hypothesis testing
Null hypothesis H0: It is the hypothesis to be tested .
Alternative hypothesis HA : It is a statement of what we believe is true if our sample data cause us to reject the null hypothesis
Text Book : Basic Concepts and Methodology for the Health Sciences 5
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