For 7-9, suppose the ages of people in a group are normally distributed with a
mean of 51.3 years and a standard
deviation of 4.19 years. Use the partial
standard normal table for your answers.
Round answers to the nearest tenth.

7. What percent of people in the group are
no more than 42 years old?
8. What z-score would you use to determine
the percent of people with an age less
than 62 years old?
9. What percent of people in the group are
between 47 and 50 years old?