Question

x	f
15-19	5
10-14	4
5-9	1

what is the highest score?

Explanation:

Step1: Identify the class intervals

The given class intervals for \( X \) are \( 20 - 25 \), \( 15 - 19 \), \( 10 - 14 \), and \( 5 - 9 \).

Step2: Determine the upper limit of the highest interval

The highest class interval is \( 20 - 25 \). In a class interval like \( a - b \), the upper limit is \( b \). So for the interval \( 20 - 25 \), the upper limit (which represents the highest possible score in that interval) is 25.

Answer:

25