STAT 2040 Lecture Notes - Lecture 9: Type I And Type Ii Errors, Normal Distribution, Null Hypothesis
1 Apr 2015
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Document Summary
2 main types of statistic inference procedures: confidence interval & hypothesis tests. Alternative hypothesis is often the hypothesis the researcher is hoping to show (not equal) (status quo hypt"): is the hypothesis of no effect or no difference (equal) Hypothesis testing steps: are based on the research question of interest, and not on the observed sample data: formulating a null hypothesis (h0) and an alternative hypothesis (ha). These hypotheses: choosing and calculating an appropriate test statistic. The value of the test statistic will: assessment based on test statistic, interpretation be based on sample data. ) unless there is a strong reason to be interested in only one. *if the null hypothesis(&the assumptions)is true, this statistic will have the standard normal distribution. *in hypothesis testing we construct a test statistic that has a known distribution assuming the null hypothesis is true. The rejection region method and the p-value method.
