9.2 Grouped Data Homework

Comments on grouped data homework - submitted 14 Nov

Feel free to leave comments here about the homework and how it can be improved

Well set out

What would a sensible value for the mean be?

Why is 45,450 unlikely to be the mean?











Very good example of how to set out work clearly...
...but there are a few problems

Where are the errors?
Why do you think it has been ticked?
What do you think about the size of the groups?

How would we know this was a mistake?

What could you do in this case?

It can be difficult to check all of the numbers that you've tallied.  How could you make it easier to check them?

Colour coding?  More strict methods of tallying?  What else?

Is the mean 178.08?

Start with good intentions...

 A mean of 5.92 miles??
And it's ticked

A lot of effort has gone in to this homework plus evidence of checking and a sensible mean with the calculation shown.

Very clear.  An excellent example of a piece of homework!