Standard deviation in lines of levels

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Lines of levels were run requiring n instrument setups. If the rod reading for each backsight and foresight has a standard deviation δ what is the standard deviation in each of the following level lines?

a) n = 40 δ = ±0.005 ft

b) n = 20 δ = ± 1.00 mm

Reference no: EM1384868

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