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 are the inner fences?
A)75.5,80.5
B)83,88
C)60.5,80.5
D)53,88
E)7.5,15

Question

Quizplus · Accepted Answer

To find the inner fences, we first need to find the quartiles: 
- Q1 (25th percentile) = 68 
- Q3 (75th percentile) = 73

Using the formula for finding the inner fences: 
Inner fence lower limit = Q1 - 1.5(IQR) 
Inner fence upper limit = Q3 + 1.5(IQR)

where IQR = Q3 - Q1

Plugging in the values: 
IQR = 73 - 68 = 5 
Inner fence lower limit = 68 - 1.5(5) = 60.5 
Inner fence upper limit = 73 + 1.5(5) = 80.5

Therefore, the inner fences are 60.5 and 80.5, and the best choice is C.

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