1. Assume the speed of vehicles along an open stretch of a certain highway in Texas that is not heavily traveled has an approximately Normal distribution with a mean of 71 mph and a standard deviation of 3.125 mph. (Make sure to show how you got your answers) a) The current posted speed limit is 65 mph. What is the proportion of vehicles going above the current posted speed limit? b) What proportion of the vehicles would be going less than 50 mph? c) What proportion of the vehicles would be going between 60 and 75 mph?
1. Assume the speed of vehicles along an open stretch of a certain highway in Texas that is not heavily traveled has an approximately Normal distribution with a mean of 71 mph and a standard deviation of 3.125 mph. (Make sure to show how you got your answers) a) The current posted speed limit is 65 mph. What is the proportion of vehicles going above the current posted speed limit? b) What proportion of the vehicles would be going less than 50 mph? c) What proportion of the vehicles would be going between 60 and 75 mph?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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