22. franny plans to spend 4 hours reading. about
how many pages would she need to read each
hour to finish the book?
franny's to-do list
• put 64 pictures in a
photo album
• finish reading 113 pages
of a book
• buy presents for kate,
wendy, and tia.
• put shoes on rack

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.