Question 5.67

67. Brisbane Babies. The table shows the births of babies at a Brisbane, Australia, hospital on a particular day.6

Girl Girl Boy Boy Boy Girl Girl Boy Boy
Boy Boy Boy Girl Girl Boy Girl Girl Boy
Boy Boy Boy Girl Girl Girl Girl Boy Boy
Boy Girl Boy Girl Boy Boy Boy Boy Boy
Girl Boy Boy Boy Boy Girl Girl Girl
  1. Construct a relative frequency distribution of the numbers of girls and boys born.
  2. Use the relative frequencies to construct a probability model.
  3. Confirm that your probability model follows the Rules of Probability.

5.1.67

(a)

Frequency Relative frequency
Girls 18
Boys 26
Total 44

(b)

Outcome Probability
Girl
Boy