For problems 7-10, use the following population information. Lifetimes of a certain brand of efrigerator are normally distributed, with a mean lifespan of 17.2 years and a standard deviation of 3.45 years. 7. What percentage of such refrigerators die before they are 8 years old?

For problems 7-10, use the following population information. Lifetimes of a certain brand of efrigerator are normally distributed, with a mean lifespan of 17.2 years and a standard deviation of 3.45 years. 7. What percentage of such refrigerators die before they are 8 years old?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 11PPS

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Transcribed Image Text:For problems 7 – 10, use the following population information. Lifetimes of a certain brand of refrigerator are normally distributed, with a mean lifespan of 17.2 years and a standard deviation of 3.45 years. 7. What percentage of such refrigerators die before they are 8 years old?

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