Answer:
Step-by-step explanation:
The modal group is 10-20, as it has the greatest frequency of 27.
Estimated mode is calculated by formula:
- EM = L + (f(m) - f(m-1))/(f(m) - f(m-1) + f(m) - (f(m+1))*w,
where
- L- lower class boundary of the modal group =10
- fm-1 - frequency of the group before the modal group = 10
- fm - frequency of the modal group =27
- fm+1 - frequency of the group after the modal group = 19
- w - group width = 10
Substitute values to get:
- EM = 10 + (27 - 10)/(27 - 10 + 27 - 19)*10 = 16.8
