STAT211 Chapter Notes - Chapter 9: Null Hypothesis, Normal Distribution, Type I And Type Ii Errors
12 Apr 2016
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Statistical test to verify out hypothesis about the population, using information from the same o. Focus on inferring the population mean using the sample mean. Steps for hypothesis testing: formulate the null and alternate hypotheses o. What is the question of interest: choose and evaluate the appropriate test statistic o. Which formula to use: assess the strength of the evidence against the null hypothesis o. Hypothesis of no effect/ no difference / status quo. Null hypothesis is given the benefit of the doubt from the start: only reject null hypothesis in favour of the alternate hypothesis if the evidence is very strong. Null hypothesis is not affected by two-sided or one-sided test. The alternate hypothesis is different based on the test. If the null hypothesis is true, the statistic will have a standard normal distribution. The rejection region is one method of determining whether the evidence against the null hypothesis is statistically significant.
