The following data gives the information on the observed lifetimes (in hours) of electrical components:
|Lifetimes (in hours)|
Determine the modal lifetimes of the components.
Solution: Here , frequency of class interval is maximum.
So, it is the modal class
Now, Lower limit of modal class
Frequency of modal class
Frequency of class preceding the modal class
Frequency of class succeeding the modal class
Class interval width = 20
Therefore, modal lifetime of electrical components is hours