In a hearing test,subjects estimate the loudness (in decibels)of sound,and the results are;68,67,70,71,68,75,68,62,80,73,68 What is the IQR?
A)18
B)6
C)5
D)7.5
E)15

Question

Quizplus · Accepted Answer

To find the IQR, we first need to find the median. The median is (68+68)/2 = 68. We then need to find the median of the lower half and upper half of the data. The lower half of the data is 62, 67, and 68. The median of this is 67. The upper half of the data is 70, 71, 73, 75, and 80. The median of this is 73. To find the IQR, we subtract the lower median from the upper median: 73 - 67 = 6. Therefore, the answer is (C) 5.

In a Hearing Test,subjects Estimate the Loudness (In Decibels)of Sound,and