InThinking Subject Sites

Subscription websites for IB teachers & their classes

Find out more


Sitemap
Recommendations
Other subjects
Brochure

Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.

Student access tools
 You need to log-in or subscribe in order to use Student access.

Power and statistics

One of the common questions is - which test is best for an experiment? Well, this depends on many different factors. One of the key ideas of statistics is that tests have different "power" - that is, the probability of making a correct decision (to reject the null hypothesis) when the null hypothesis is false. Power is the probability that a test of significance will pick up on an effect that is present.

To access the entire contents of this site, you need to log in or subscribe to it.

Alternatively, you can request a one month free trial.