Below is a frequency distribution of the number of days absent from school in a group of 25 fifth-grade students.
What is the cumulative relative frequency for 7 days absent?
A)0
B).87
C).96
D)24.0

Question

Below is a frequency distribution of the number of days absent from school in a group of 25 fifth-grade students. 
What is the cumulative relative frequency for 7 days absent?
A)0 
B).87 
C).96 
D)24.0

Quizplus · Accepted Answer

The cumulative relative frequency for 7 days absent can be found by adding up the relative frequencies for all values less than or equal to 7.

For this frequency distribution, the relative frequency for 7 days absent is 0.04 (found by dividing the frequency of 1 by the total number of students, which is 25), and the relative frequency for 6 days absent is 0.08 (found by dividing the frequency of 2 by 25).

Adding these two relative frequencies together gives a cumulative relative frequency of 0.12.

Then, the relative frequency for 5 days absent is 0.16, so the cumulative relative frequency for 7 days absent is 0.04 + 0.08 + 0.16 + 0.24 + 0.28 + 0.4 = 0.96. Therefore, the best answer is C) .96.

Below Is a Frequency Distribution of the Number of Days