Measurement of computer chip’s thickness (in monometers) is recorded below.

Thickness of chips (in nanometers) 34-39 39-44 44-49 49-54 54-59 Total
Number of computers 3 11 16 25 5 60

Find the mode of thickness of computer chips and interpret the result.

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Solution:

Here,

Thickness No. of computer(f)
34-39 3
39-44 11
44-49 16
49-54 25
54-59 5
N = 60

Here, 49-54 class has highest frequence

Therefore, modal class = 49-54

Now, mode = \(L + \frac{f_1 – f_0}{2f_1 – f_0 – f_2}\)

= \(49 + \frac{25 – 16}{2 \times 25 – 16 – 5}\)

= 49.31

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