Question

The following data gives the information on the observed lifetimes (in hours) of 225 electrical components:

Determine the modal lifetimes of the components:

Answer 1

Class interval which has mode = 60 – 80

Here, l = 60, f1 = 61, f0 = 52, f2 = 38, h = 20

∴ Mode = 65.63 Hours