I am having trouble getting the mean and standeard deviation. could you please show me how ? thanks

perscription data

0.4-1.1

1.2-1.9

2.0-2.7

2,8-3.5

3.6-4.3

Frequency

2

2

4

3

9

Results 1 to 4 of 4

- February 5th 2008, 04:34 PM #1

- Joined
- Mar 2006
- Posts
- 14

- February 5th 2008, 04:54 PM #2

- Joined
- Oct 2007
- From
- London / Cambridge
- Posts
- 591

- February 5th 2008, 05:25 PM #3

- Joined
- Mar 2006
- Posts
- 14

- February 5th 2008, 05:43 PM #4

- Joined
- Oct 2007
- From
- London / Cambridge
- Posts
- 591