A man won £300 and decides to give it to his 3 children. He gives 2/5 Of his money to Andrew, 1/3 to Ben, and the rest to Carla. Work out how much money Carla receives

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.