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3. Suppose that on a certain section of SRP with a posted speed limit of 65 kph(kilometers per hour), the speeds of all vehicles have a bell-shaped distribution with a mean of 72 kph and a standard deviation of 3 kph. a) Using the empirical rule, find the percentage of vehicles with the following speeds on this section of SRP. i. 63 to 81 kph ii. 69 to 75 kph b) Using the empirical rule, find the interval that contains the speeds of 95% of vehicles travelling on this section of SRP.

3. Suppose that on a certain section of SRP with a posted speed limit of 65 kph(kilometers per hour), the speeds of all vehicles have a bell-shaped distribution with a mean of 72 kph and a standard deviation of 3 kph. a) Using the empirical rule, find the percentage of vehicles with the following speeds on this section of SRP. i. 63 to 81 kph ii. 69 to 75 kph b) Using the empirical rule, find the interval that contains the speeds of 95% of vehicles travelling on this section of SRP.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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3. Suppose that on a certain section of SRP with a posted speed limit of 65 kph(kilometers per hour), the speeds of all vehicles have a bell-shaped distribution with a mean of 72 kph and a standard deviation of 3 kph. a) Using the empirical rule, find the percentage of vehicles with the following speeds on this section of SRP. i. 63 to 81 kph ii. 69 to 75 kph b) Using the empirical rule, find the interval that contains the speeds of 95% of vehicles travelling on this section of SRP.
Transcribed Image Text:3. Suppose that on a certain section of SRP with a posted speed limit of 65 kph(kilometers per hour), the speeds of all vehicles have a bell-shaped distribution with a mean of 72 kph and a standard deviation of 3 kph. a) Using the empirical rule, find the percentage of vehicles with the following speeds on this section of SRP. i. 63 to 81 kph ii. 69 to 75 kph b) Using the empirical rule, find the interval that contains the speeds of 95% of vehicles travelling on this section of SRP.
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