A collector's mode
scaled so that 1 inch on the
model equals 6 feet on the
actual car. If the model is 0.75
inches high, how many feet
high is the actual car? Enter
your answer as a decimal.

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.