Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 22 Feb 2018 My Price 6.00

automobile tires

Refer to Problem 11.

a. Suppose that 6% of all automobile tires with the longest tread life have a tread life of at least x miles. Find the value of x.

b. Suppose that 2% of all automobile tires with the shortest tread life have a tread life of at most x miles. Find the value of x.

Problem 11:

In a National Highway Transportation Safety Administration (NHSTA) report, data provided to the NHSTA by Goodyear stated that the average tread life of properly inflated automobile tires is 45,000 miles (Source: http://www.nhtsa.dot.gov/cars/rules/rulings/TPMS_FMVSS_No138/part5.5.html). Suppose that the current distribution of tread life of properly inflated automobile tires is normally distributed with a mean of 45,000 miles and a standard deviation of 2360 miles.

a. Find the probability that a randomly selected automobile tire has a tread life between 42,000 and 46,000 miles.

b. What is the probability that a randomly selected automobile tire has a tread life of less than 38,000 miles?

c. What is the probability that a randomly selected automobile tire has a tread life of more than 50,000 miles?

d. Find the probability that a randomly selected automobile tire has a tread life between 46,500 and 47,500 miles.

 

Answers

Maurice Tutor
(5)
Status NEW Posted 22 Feb 2018 10:02 PM My Price 6.00

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