1. When we compute the mean of a frequency distribution, why do we refer to this as an
estimated mean?
2. Determine the mean and the standard deviation of the following frequency distribution.
|
Class
|
Frequency
|
|
0 up to 5
|
2
|
|
5 up to 10
|
7
|
|
10 up to 15
|
12
|
|
15 up to 20
|
6
|
|
20 up to 25
|
3
|