Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...

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Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...

Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 90% confidence interval estimate of the population standard deviation. 60,65,65,55,65,53,59,58,59,70,61,67

math Statistics-And-Probability

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Answer 1

Answer #1

(n-1)s*

s^2 = 25.53788

df = n-1 =11

sqrt(25.5378 * 11 / 19.67514 ) < sd < sqrt( 25.5378 * 11 / 4.574813)

= (3.778585, 7.836126)

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Answer 2

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