Revision Bites - Grouped data mean standard deviation continuous discrete statistics A Level IB Math

Formula to find midpoint or midvalue using upper class boundary and lower class boundaries to calculate estimated mean or standard deviation from grouped discrete or continuous frequency table data. This is a short extract from these full length videos: Casio Graphic    • Continuous Data? Mean & Standard Deviation...   Casio Classwiz:    • Casio Classwiz - Mean & Standard Deviation...   Revision Bites for A Level, AS Level and IB Mathematics. These are short extracts of longer tutorials on how to use your Casio Classwiz FX-991EX or Casio Graphical Calculator FX-9750gii FX-9860gii FX-CG50 or equivalent, showing key revision facts to watch when preparing for a test or exam. Follow my playlists or make your own! Want to purchase a Casio Calculator featured in this video? The links below will take you straight to genuine Casio products direct from Amazon: UK Residents: Casio Classwiz fx-991EX - http://amzn.to/2lqiECX Casio FX-CG50 (newest!) - http://amzn.to/2kFO9s4 Casio FX-9860gii (midrange) - http://amzn.to/2BzJeTV Casio FX-9750gii (cheapest!) - http://amzn.to/2BAr98u US Residents: Casio Classwiz fx-991EX - http://amzn.to/2CXrK01 Casio FX-CG50 (newest!) - http://amzn.to/2CYIWSW Casio FX-9860gii (mid-range) - http://amzn.to/2l23aUi Casio FX-9750gii (cheapest!) - http://amzn.to/2zgxZd0 Canada Residents: Casio Classwiz fx-991EX - http://amzn.to/2D68oGl Casio FX-CG50 (newest!) - http://amzn.to/2C2qb4e Casio FX-9860gii (mid-range) - http://amzn.to/2BX54h5 Casio FX-9750gii (cheapest!) - http://amzn.to/2BulVa8 How to use your Casio Classwiz Series:    • Casio classwiz -  Intro Guide - Can I use ...   How to use your Casio Classwiz FX991EX Calculator Revision Series:    • Casio classwiz -  Intro Guide - Can I use ...   MrTompkinsEdTech on Social Media:    / mrtompkinsedtech     / mrtompkinsedtech     / anthonytompkins   Mr Tompkins is a qualified teacher with 20+ years classroom experience. BSc (Hons) Mathematics, Post Graduate Certificate in Education, Certified Apple Teacher and Microsoft in Education (MIE) Trainer. I am using the fx-991EX in this video, which is functionally equivalent to the FX-570EX, FX-991D EX, FX-87DE X and FX-JP900. MrTompkinsEdTech is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.