I was trying to explain to my learners that, the number of data sets (scores) can be a sample or the actual population. It was a rather worse when I said that, when the data is less than 30, you need to divide by n - 1, not just n. They were confused. I think this is a very powerful statistical method that is beyond grade 11 comprehension. I think we rather stick to one formula. The catch is, we have to incorporate both scenarios as it depends on the data given.
On a more positive note, they managed to master the three spreads, i.e. variance, standard deviation and mean deviation. But they need more examples to see how to make good interpretations of the results. I really enjoyed this session.
Comments welcome...
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment