What expression is equivalent to 4,325,000,000 Answer choices: A: 4.325 x 10^-9 B:4.325 x 10^-6 C: 4.325 x 10^6 D: 4.325 x 10^9

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.