Finding Confidence Intervals. In Exercises 916, assume
Chapter 7, Problem 14(choose chapter or problem)
Finding Confidence Intervals. In Exercises 916, assume that each sample is a simplerandom sample obtained from a population with a normal distribution. Highway Speeds Listed below are speeds (mi/h) measured from southbound traffic onI-280 near Cupertino, California (based on data from SigAlert). This simple random samplewas obtained at 3:30 p.m. on a weekday. Use the sample data to construct a 95% confidenceinterval estimate of the population standard deviation. Does the confidence interval describethe standard deviation for all times during the week?62 61 61 57 61 54 59 58 59 69 60 67
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