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The following data gives the information...

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.

A

`65.625`

B

`65`

C

`34.52`

D

None

Text Solution

Verified by Experts

The correct Answer is:
A

From the table, it can be observed that the maximum class frequency is 61, belonging to class interval `60 − 80`
Therefore, modal class = 60 − 80
Class size, `h = 20`
Lower limit of modal class, `l = 60` ...
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