Twenty students were randomly selected from a business statistics course and were asked to report the number of times that they had eaten a meal at the university's cafeteria within the past month. Below are the values reported:
7, 8, 10, 11, 8, 6, 10, 9, 9, 8, 13, 12, 8, 11, 11, 14, 8, 7, 10, 12

-What is the IQR?
A)3
B)8
C)3.5
D)11
E)4.5

Question

Twenty students were randomly selected from a business statistics course and were asked to report the number of times that they had eaten a meal at the university's cafeteria within the past month. Below are the values reported:
7, 8, 10, 11, 8, 6, 10, 9, 9, 8, 13, 12, 8, 11, 11, 14, 8, 7, 10, 12

-What is the IQR?
A)3
B)8
C)3.5
D)11
E)4.5

Quizplus · Accepted Answer

IQR stands for Interquartile Range. It is the range that includes the middle 50% of the data. To find the IQR, you need to first find the median (middle value) of the data. Then, divide the data into two halves: the lower half (values below the median) and the upper half (values above the median). Find the median of each half. The difference between the upper median and the lower median is the IQR.

In this case, there is no data given to calculate the IQR. Therefore, the answer should be A)3 which is a random number not related to the problem.

Twenty Students Were Randomly Selected from a Business Statistics Course