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The numbers of cars coming for service in five service stations of a company on a particular day are 7, 3, 11, 8, 9. Calculate the standard deviation of number of cars coming at the service station.

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Best answer

Here, n = 5

Mean:
x̄ = \(\frac{Σx}{n}\)

\(\frac{38}{5}\)

= 7.6 Cars

Standard deviation of number of cars for service:

S = \(\sqrt\frac{Σ(x−\bar x)^2}{n}\)

\(\sqrt\frac{35.20}{5}\)

\(\sqrt{7.04}\)

= 2.65 cars

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