Investigate the meaning and calculation of standard deviation using a small set of data

1. A First For Fiona 3 - interpret average, standard deviation
2. A First For Fiona 2 - interpret average, standard deviation
3. How Handy! 2 - normal distribution, standard deviation
4. How Handy! 1 - normal distribution, standard deviation
5. A First For Fiona 1 - interpret average, standard deviation