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Objective Question & Answer

QUESTION

Objective Question

Q.1

Four rain gauge stations are installed over a catchment and they recorded average rainfalls of

105, 79, 70 and 66 cm. If the coefficient of variation for the recorded values is 21.90%, the

percentage accuracy in the estimation of average rainfall for the catchment will be

A
10.95%
B
89.05%
C
98.63%
D
100%
Answer ( Option B)

89.05%

Solution

Number of rain gauge stations n = 4

Average rainfalls = 105, 79, 70 & 66 cm

Coefficient of variation Cv = 21.9%

E= 10.95%

Percentage of accuracy = 100 - E

= 100 - 10.95 = 89.05%

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