STAT211 Chapter Notes - Chapter 9: Null Hypothesis, Normal Distribution, Type I And Type Ii Errors
Document Summary
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.