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The random error in the arithmetic mean of 50 observations is ‘a’ , then the random error in the arithmetic mean of 200 observations a would be(a) 4\(a\)(b) 16\(a\)2(c)\(\frac{a}{4}\)(d) \(\frac{a}{2}\) |
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Answer» Correct answer is (c)\(\frac{a}{4}\) |
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