A Sample of Recorded Dog Barks Is Analyzed for Decibel

question 12

Multiple Choice

A sample of recorded dog barks is analyzed for decibel intensity.The mean intensity is 62.25 decibels, with a variance of 4.45.If this data set is normally distributed, we would expect approximately 95% of the barks to be within what range?

• A) (58.03, 66.47)
• B) (60.16, 64.36)
• C) (55.92, 66.47)
• D) (53.35, 71.15)

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