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 ...

Hypothesis testing is a branch of statistics in which an inference is made about a population parameter or a population ...

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 ...

Successful completion of this course demonstrate your achievement of the following learning outcomes for the MS-DS program: Define a composite hypothesis and the level of significance for a test with ...

Confidence intervals and hypothesis tests are directly linked ... Here's another distinction between what a p-value and CI tells us: a p-value answers the question "How surprising is my sample?" The ...

A one-sample t-test can be used to determine whether ... on hand gives you exactly what you need to prove or reject your null ...

A hypothesis is an idea about how something works that can be tested using experiments. A prediction says what will happen in an experiment if the hypothesis is correct. Presenter 1: We are going ...

The first thing any scientist does before performing an experiment is to form a hypothesis about the experiment's outcome. This often takes the form of a null hypothesis, which is a statistical ...

A hypothesis is an idea about how something works that can be tested using experiments. A prediction says what will happen in an experiment if the hypothesis is correct. Presenter 1: We are going ...