In a group of 100 children, the mean weight of a child is 15 kg. The SD is 1.5 kg. Which one of the following is TRUE
95% of all children weigh between 12 and 18 kg 95% of all children weigh between 13.5 and 16.5 kg 99% of all children weigh between 12 and 18 kg 99% of all children weigh between 13.5 and 16.5 kg