Auto batteries have an average life of 2.7 years. Battery life is normally distributed with a mean of 2.7 years and a standard deviation of 0.43 years. The batteries are warranted to operate for a minimum of 2 years. If a battery fails within the warranty period, it will be replaced with a new battery at no charge. The company sells and installs the batteries. Also, the usual $5 installation charge will be waived. Use and Table B. a. What percentage of batteries would you expect to fail before the warranty period expires? (Round your z value to 2 decimal places. Round probabilities to 4 decimal places. Round your final answer to 2 decimal places.) Percentage b. A competitor is offering a warranty of 26 months on its premium battery. The manager of this company is toying with the idea of using the same battery with a different exterior, labeling it as a premium battery, and offering a 26-month warranty on it. What percentage of the batteries would you expect to fail before this new warranty period expires? (Round your z value to 2 decimal places. Round probabilities to 4 decimal places. Round your final answer to 2 decimal places.) Percentage
Auto batteries have an average life of 2.7 years. Battery life is normally distributed with a mean of 2.7 years and a standard deviation of 0.43 years. The batteries are warranted to operate for a minimum of 2 years. If a battery fails within the warranty period, it will be replaced with a new battery at no charge. The company sells and installs the batteries. Also, the usual $5 installation charge will be waived. Use and Table B. a. What percentage of batteries would you expect to fail before the warranty period expires? (Round your z value to 2 decimal places. Round probabilities to 4 decimal places. Round your final answer to 2 decimal places.) Percentage b. A competitor is offering a warranty of 26 months on its premium battery. The manager of this company is toying with the idea of using the same battery with a different exterior, labeling it as a premium battery, and offering a 26-month warranty on it. What percentage of the batteries would you expect to fail before this new warranty period expires? (Round your z value to 2 decimal places. Round probabilities to 4 decimal places. Round your final answer to 2 decimal places.) Percentage
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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