OPER1135 Lecture Notes - Lecture 13: Null Hypothesis, Standard Deviation, Statistic
25 Mar 2015
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Document Summary
Clt says that the sample mean has a normal distribution with mean and standard deviation. When we substitute s for we are introducing more variability into our estimate. So the value has a t-distribution with n-1 degrees of freedom. In american court of law no one is proved innocent they are not found guilty: the statement of h0 always contains an equal sign: =, , or , choose : 1. state the null hypothesis, h0 and the alternative hypothesis, h1. 2. choose the level of significance, a, and the sample size, n. 3. determine the appropriate test statistic and sampling distribution. 4. determine the critical values to create rejection region. 5. collect data and compute the value of the test statistic. 6. make the statistical decision and state the managerial conclusion. If test statistic falls in rejection region then reject h0, otherwise do not reject h0. State the managerial conclusion in the context of the problem.
