Listed below are speeds (mi/h) measured from southbound traffic on i-280 near cupertino, california (based on data from sigalert). this simple random sample was obtained at 3: 30 pm on a weekday. use the sample data to construct a 95% confidence interval estimate of the population standard deviation. 62 61 61 57 61 54 59 58 59 69 60 67a.) 4.7 mi/h< < 5.6 mi/h
b.) 2.9 mi/h< < 6.9 mi/h
c.) 3.1 mi/h< < 8.5 mi/h
d.) 1.6 mi/h< < 4.9 mi/h
e.) 5.4 mi/h< < 9.2 mi/h