Need help with algebra. random answers get reported. Let n represent an even integer. Write an expression for each of the following.
1. the next consecutive integer
2. the next even integer
3. the previous even integer

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.