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.   64 60 60 55 60 54 59 58 59 69 58 67 The confidence interval estimate is___ ​mi/h<σ<___​mi/h. Does the confidence interval describe the standard deviation for all times during the​ week? Choose the correct answer below.

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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.
 
64
60
60
55
60
54
59
58
59
69
58
67

The confidence interval estimate is___ ​mi/h<σ<___​mi/h.

Does the confidence interval describe the standard deviation for all times during the​ week? Choose the correct answer below.

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