[" 26.The random error in the arithmetic...

[" 26.The random error in the arithmetic mean of "100],[" observations is "x" ; then random error in the arithmetic "],[" mean of "400" observations would be: "],[[" (a) "4x," (b) "(1)/(4)x," (c) "2x," (d) "(1)/(2)x]]

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[" 26.The random error in the arithmetic mean of "100],[" observations is "x" ; then random error in the arithmetic "],[" mean of "400" observations would be: "],[[" (a) "4x," (b) "(1)/(4)x," (c) "2x," (d) "(1)/(2)x]]

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