1. What is the class width?
2. How many classes are represented in the graph?
3. What is the midpoint of the first class?
4. What are the lower and the upper limits of the first class? Use one decimal
place for upper limits.
lower: (answer) //upper: (Answer)
5. What is the midpoint of the last class? (answer)
6. What are the lower and the upper limits of the last class?
lower: [ Select ] //upper: (answer)
7. Which age group has the highest population? (answer) Estimate the
population of this age group. (answer)
8. Which age group has the lowest population? (answer) Estimate the
population of this age group. (answer)
The following frequency polygon shows the number of CA residents with age in between 3 and 48 years (not including 48) on Feb.1,2020 without health insurance. (Consider age up to one decimal place: ex.23.7 years old,12.9 years old). Number (in hundred thousands)
25
20
15
10
5
5.5 10.515.520.525.530.5 35.540.5 45.5 Age(years)