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The intervals measured by a clock given ...

The intervals measured by a clock given the following readings 1.25 1.24 s, 1.27 s, 1.21 s and 1.28 s. What is the percentage relative error is the observations?

A

`4%`

B

`16%`

C

`1.6%`

D

`0.2% `

Text Solution

Verified by Experts

The correct Answer is:
C
Mean of given observations
`= (1.25 + 1.24 + 1.27 + 1.21 + 1.28)/(5) = 1.25 "sec"`
Man of errors
`= (0 + 0.01 + 0.02 + 0.04 + 0.03)/(5)`
`= (0.1)/5`
`% "error" = (0.1 xx 100)/(5 xx 1.25) = 1.6%`
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