In order to have enough evidence to reject the null hypothesis, we want our p-value to be as small as possible. The p-value is almost always calculated using a computer. It is possible to learn to use ...

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 ...

Confidence intervals and hypothesis tests are directly linked. Confidence intervals can be used to check the ... Here's another distinction between what a p-value and CI tells us: a p-value answers ...

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 ...