I will give brainliest to the first one to say (hey)

Finding tbe values of the variables in each kite

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.

What is the sum of these mixed numbers 4 2/3+ 3 1/9