8 Steps of Hypothesis Testing
Research Hypothesis: an empirically testable statement derived from theory. It is stated in terms of the population. It holds for the whole population, but we only have a sample.
Null Hypothesis: the opposite of the research hypothesis given as a fixed value.
Assume the Null: to derive a sampling distribution. A mathematical probability distribution, we do not find it empirically
Determine the Critical Region: 5% or less
Calculate a test (sample) statistic
One and Two Tailed Tests: One tailed test: a statistical test where extreme results leading to rejection of the null hypothesis can be located at only one tail. Two Tailed Test: A statistical test where extreme results leading to rejection of null hypothesis will be located at both left and right tails
2 Error Types: Type I error is to rejecting a true null. Type II is failing to reject a false null.
Make a decision - infer about your research hypothesis.