Question

Find the upper limit and lower limit of the class interval $(60-69)$

• A. lower class limit = 59.5, upper class limit = 69.5
  
• B. lower class limit = 59, upper class limit = 69
• C. lower class limit = 59.5, upper class limit = 69
• D. lower class limit = 59, upper class limit = 69.5

Answer 1

The correct option is A lower class limit $=59.5,$ upper class limit $=69.5$

To find the class limit, in the inclusive method (when the upper-class limit of any class interval will not be the lower class limit of the next class interval), subtract $0.5$ from the lower score to get the lower class limit and add $0.5$ to the upper score to get the upper-class limit.

Lower class limit and Upper-class limit of class interval $(60-69)$

lower class limit $=60-0.5=59.5$
upper class limit $=69+0.5=69.5$