Merry Christmas and happy calendrical convention. First lesson back is Friday 5th January. The days are getting longer now and the Sun is coming back!

The video above concentrates on drawing the cumulative frequency curve and on using the curve to find the median and the upper and lower quartiles.

You need to check that you can answer questions like “what percentage of the cress seedlings are greater than 50mm in length?”, and you may have intervals written in different ways. I’ll have the handout referred to up here in a day or so!

How to find the mean, median and the mode from a frequency table. You can download a worksheet with the data in tables as the slides may not be fully clear in the YouTube video (I used fonts that were a bit small).

Download the PDF with frequency tables from the screencast

The Leitch Review of Skills education is a weighty tome from the Government that sets out policy for education and training for adults in the UK. One sharp eyed manager spotted this chart lurking in the appendicies.

The chart has been drawn in a way that could be called ’sharp practice’ or ‘dodgy’. Can you see what is wrong with the chart? Click ‘read more’ for my answer….

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