Make statistics real by using this practical investigation to test a hypothesis. This teaches students how to do standard deviation and T-test as well as why they do it . Written for OCR but can be applied to other A levels. The data they collect is easy and quick and gives good results! This is a whole lesson resource. The power point asks questions and gives instructions. There are also sample results given. The resources includes an active spreadsheet that makes some calculations for the students. I was skeptical that this would “work” to give a significant difference between the means - but it did.