Hypothesis Testing
       • Hypothesis testing is the key to our scientific 
         inquiry. 
       • In additional to research hypotheses, need 
         statistical hypotheses.
       • Involves the statement of a null hypothesis, an 
         alternative hypothesis, and the selection of a 
         level of significance. 
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    Statistical Hypotheses
      • Statements of circumstances in the population 
        that the statistical process will examine and 
        decide the likely truth or validity
      • Statistical hypotheses are discussed in terms of 
        the population, not the sample, yet tested on 
        samples
      • Based on the mathematical concept of 
        probability
          • Null Hypothesis
          • Alternative Hypothesis
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    Null Hypothesis
      • What is the Null Hypothesis?
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    Null Hypothesis
       • The case when the two groups are equal; 
         population means are the same
       • Null Hypothesis  = H0
       • This is the hypothesis actually being tested
       • H  is assumed to be true
           0
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    Alternative Hypothesis
       • What is the Alternative Hypothesis?
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