Find the measure of each numbered angle if AB 1. BC. (For review, see Lesson 4-2.) A
5. 22
7. 24
9. 26
2
1 104
6. 3
8. 25
10.27
36
40°
7
5
6
11. 28
B

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.