Question

Maternal age at childbirth. How old are women when they have their first child? Here is the distribution of the age of the mother for all firstborn children in the United States in a certain year: NOTE: The numerical values in this problem have been modified for testing purposes. AGE COUNT AGE COUNT 10 to 14 years 3632 30 to 34 years 300319 15 to 19 years 251381 35 to 39 years 105975 20 to 24 years 460595 40 to 44 years 23967 25 to 29 years 422101 40 to 49 years 1978 (a) For comparison with other years and with other countries, we prefer a histogram of the counts in each age class a histogram of the percents in each age class (b) How many babies were there? babies (c) The distribution is: right-skewed left-skewed (d) In which age classes do the median and quartiles fall? Median fall in: 40 to 44 years 10 to 14 years 45 to 49 years 20 to 24 years 15 to 19 years 25 to 29 years 30 to 34 years 35 to 39 years Q1 fall in: 20 to 24 years 30 to 34 years 10 to 14 years 35 to 39 years 25 to 29 years 15 to 19 years 45 to 49 years 40 to 44 years Q3 fall in: 30 to 34 years 20 to 24 years 35 to 39 years 25 to 29 years 40 to 44 years 45 to 49 years 10 to 14 years 15 to 19 years

Answer 1