Question 2.248

111. Frequency Polygon. The following frequency polygon represents the quiz scores for a course in introductory statistics.

image
  1. What is the class width?
  2. What is the lower class limit of the class that has 45 as its midpoint?
  3. What is the upper class limit of the class that has 45 as its midpoint?
  4. Which class has the highest frequency?
  5. Which class has the lowest frequency?

2.2.111

(a) 15 (b) 37.5 (c) 52.5 (d) 67.5 to 82.5 (e) 22.5 to 37.5