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?
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.
95% of all children weight between 12 and 18 kg
95% of all children weight between 13.5- and 16.5kg
99% of all children weight between 12 and 18 kg
99% of all children weight between 13.5 and 16.5kg