Question

identify the lower class limits, upper class limits, class width, class midpoints, and in the summary. blood platelet count of males (1000 cells/μl) frequency 0 - 99 1 100 - 199 50 200 - 299 90 300 - 399 13 400 - 499 0 500 - 599 0 600 - 699 1 identify the class width (in 100 cells/μl). 100 (type an integer or a decimal. do not round.) identify the class midpoints (in 1000 cells/μl). (type integers or decimals. do not round. use ascending order.)

Explanation:

Step1: Recall mid - point formula

The formula for the mid - point of a class interval with lower limit $L$ and upper limit $U$ is $\text{Mid - point}=\frac{L + U}{2}$.

Step2: Calculate mid - points for each class

For the class $0 - 99$: $\frac{0+99}{2}=49.5$.
For the class $100 - 199$: $\frac{100 + 199}{2}=149.5$.
For the class $200 - 299$: $\frac{200+299}{2}=249.5$.
For the class $300 - 399$: $\frac{300 + 399}{2}=349.5$.
For the class $400 - 499$: $\frac{400+499}{2}=449.5$.
For the class $500 - 599$: $\frac{500 + 599}{2}=549.5$.
For the class $600 - 699$: $\frac{600+699}{2}=649.5$.

Answer:

$49.5,149.5,249.5,349.5,449.5,549.5,649.5$