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 99% confidence interval estimate of the population standard deviation. 62 61 61 56 61 54 60 59 60 68 58 69 A) The confidence interval estimate is ___ mi/h < σ < ___ mi/h (Round to 1 decimal place as needed) B)Does the confidence interval describe the standard deviation for all times during the? week? a) No, The confidence interval is an estimate of the standard deviation of the population of speeds at 3:30 P.M. on a weekday, not other times.
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 99% confidence
62 61 61 56 61 54 60 59 60 68 58 69
A) The confidence interval estimate is ___ mi/h < σ < ___ mi/h
(Round to 1 decimal place as needed)
B)Does the confidence interval describe the standard deviation for all times during the? week?
a) No, The confidence interval is an estimate of the standard deviation of the population of speeds at 3:30 P.M. on a weekday, not other times.
b)Yes, The confidence interval describes the standard deviation for all times during the week.
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