Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 10 (Q.No. 3)
3.
Based on the Gaussian law of distribution of random errors, the number of errors that are expected to exceed the limit of ± a, where 0 represents the standard deviation, out of 1000 observations is
317
46
30
3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Erick said:   6 years ago
Based on Gaussian law.

68.3% no. of errors at limit +/- 1a.
95.4% w/in +/- 2a.
99.7% w/in +/- 3a.

Therefore; no.of errors = 1000-(1000 * 68.3/100) = 317.

Subha Annadurai said:   6 years ago
Anyone explain it.

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