Pls work out and give detail. Use the slope formula to determine the slope of each line. 4. AB
5.
4
2
B
A
X
-4-2
0
2.
-2
-4

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.