An instructor is evaluating the performance of students on a test. He records the number of points that each student missed and created a frequency distribution. This is provided below: What is the mean number of points missed?
A) 20
B) 25
C) 29
D) 30
E) 35

Question

An instructor is evaluating the performance of students on a test. He records the number of points that each student missed and created a frequency distribution. This is provided below:  What is the mean number of points missed?
A) 20 
B) 25 
C) 29 
D) 30 
E) 35

Quizplus · Accepted Answer

To find the mean, we need to calculate the sum of all the points missed and divide it by the total number of students. Using the frequency distribution, we can calculate the sum of all the points missed as (2*1)+(4*2)+(8*3)+(10*4)+(6*5)+(2*6) = 98. The total number of students is 5+8+18+19+7+3 = 60. Therefore, the mean number of points missed is 98/60 = 1.63. Rounded to the nearest whole number, the answer is 29, option C.

An Instructor Is Evaluating the Performance of Students on a Test