Question
Suppose average Dominos delivery times are normally distributed with a standard deviation of six minutes. A random sample of 28 pizza delivery restaurants is taken
Suppose average Dominos delivery times are normally distributed with a standard deviation of six minutes. A random sample of 28 pizza delivery restaurants is taken and has a population delivery time of 33 minutes.
(a) Find a 93% confidence interval estimate for the population mean delivery time.
(b) Findan 88% confidence interval estimate for the population mean delivery time.
(c) Which confidence interval is the most accurate in estimating the population mean delivery time?
(d) Which confidence interval is the widest?
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Bridging Algebra, Geometry, And Topology
Authors: Denis Ibadula, Willem Veys
1st Edition
3319091867, 9783319091860
