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What is In a group of 100 children, the mean weight of children is 15 kg. The standard deviation is 1.5 kg. Which one of the following is true? and explain in detail?
n = 100 children, Mean weight (m) =15 kg, SE = 1.5 kg,
95% of value are contained in Mean ± 2SD (m ± 2s),
Thus 95% of all children will have weight between 15 + 2 (1.5) i.e. between 12 and 18 kg.