Is the work shown below correct? Explain your answer.
(11 + 21 ) - (3 - 107)
= 11 + 21 - 3 - 10/
= (11 - 3) + (21 - 107)

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

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.

Can someone show me step by step how to do this?