Hypothesis testing is a branch of statistics in which, using data from a sample, an inference is made about a population parameter or a population probability distribution. Let’s look at the purpose ...

We can design studies to have particulat levels of power. We typically go for 80 or 90% power which mean 80% or 90% of the time, our study will correctly reject the null hypothesis. Sample size ...

Confidence intervals and hypothesis tests are directly linked ... a p-value answers the question "How surprising is my sample?" The confidence interval can answer the question "What values of the ...

Define a test statistic, level of significance, and the rejection region for a hypothesis test. Give the form of a rejection region. Perform tests concerning a true population variance. Compute the ...