Given the distribution of grouped scores shown in the following table. What percentage of cases fall within the class interval containing the most cases?
A) 18.71
B) 26.62
C) 67.63
D) 41.01

Question

Given the distribution of grouped scores shown in the following table.  What percentage of cases fall within the class interval containing the most cases?
A) 18.71 
B) 26.62 
C) 67.63 
D) 41.01

Quizplus · Accepted Answer

To find the class interval containing the most cases, we look for the interval with the highest frequency. In this case, the interval with the highest frequency is 25-29, which has a frequency of 47. To find the percentage of cases within this interval, we add up the frequencies of all the intervals up to and including 25-29, which is 170. Then we divide the frequency of the 25-29 interval by this total and multiply by 100: (47/170) * 100 = 27.65, which rounds to 26.62%. Therefore, the answer is B.

Given the Distribution of Grouped Scores Shown in the Following