The ages (in months) at which 50 children were first enrolled in a preschool are listed below.

a. Construct a stem and leaf display for the data.
b. Construct a relative frequency histogram for these data. Start the lower boundary of the first class at 30 and use a class width of 5 months.
c. Compare the graphs in parts a and b. Are there any significant differences that would cause you to choose one as the better method for displaying the data?
d. What proportion of the children were 35 months (2 years, 11 months) or older, but less than 45 months (3 years, 9 months) of age when first enrolled in preschool?
e. If one child were selected at random from this group of children, what is the probability that the child was less than 50 months old (4 years, 2 months) when first enrolled in preschool?

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