The following data gives the information on the observed lifetimes (in hours) of 225 electrical components: Lifetimes (in hours): 0-20 20-40 40-60 60-80 80-100 100-120 No. of components: 10 35 52 61 38 29 Determine the modal lifetimes of the components.

Question

Philoid · Accepted Answer

From the data as given above we may observe that maximum class frequency 61 belonging to the class interval 60 -80

So, modal class = 60-80

l=60, f₁=61, f₀=52, f₂=38, h=20

=

=60 +

=65.625hours

Lifetimes (in hours):	0-20	20-40	40-60	60-80	80-100	100-120
No. of components:	10	35	52	61	38	29

The following data gives the information on the observed lifetimes (in hours) of 225 electrical components:Lifetimes (in hours):0-2020-4040-6060-8080-100100-120No. of components:103552613829Determine the modal lifetimes of the components.

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

Lifetimes (in hours):

0-20

20-40

40-60

60-80

80-100

100-120

No. of components:

10

35

52

61

38

29

Determine the modal lifetimes of the components.