In a Hearing Test, Subjects Estimate the Loudness (In Decibels)

question 269

Multiple Choice

In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are (mean = 70) :
68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68

-What is the standard deviation?

• A)18
• B)4.73
• C)22.40
• D)324
• E)6.76

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