This is a look at the grouped data and in particular the estimated mean. This still tends to be a popular exam question at GCSE and a question year on year done poorly. This whole lesson has some excellent teaching slides, which will promote understanding as well as a useful worksheet to use.
It comes with the usual starter, learning objectives, keywords, teaching slides, worksheet with answers and plenary. I teach the following lessons on averages in the following sequence:
1. Basic Averages (mode, median, mean) and the Range
2. What average is best (rich task)
3. Grouped Data - Finding the estimated mean
4. Grouped vs Non Grouped data (practical lesson)
All lessons are available in my shop as well as in a bundle at a slightly reduced cost.
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