Posted: December 24th, 2016

What is the difference between the null and alternative hypotheses statements in one tailed and two tailed tests?

What is the difference between the null and alternative hypotheses statements in one tailed and two tailed tests? What are significance/alpha levels and how does using a one versus a two tailed test affect significance levels? Provide an example of a research study that would use one particular significance level over another, please explain why you choose that particular alpha/significance level and provide the researchers hypothesis using the null and alternative too.