61%9:15 PM Q STAT WA 7.3 Hmwk - Area X G hemoglobin - GoX + G somnelance - G X porp https://www.webassign.net/web/Student/Assig 0 Z Need Help? Read It Talk to a Tutor Viewing Saved Work Revert to Last Response 6. 0/1 points Previous Answers BBBasicStat8 7.3.031. My Notes Ask Your Teacher Suppose, household color TVs are replaced at an average age of u 8.4 years after purchase, and the (95% of data) range was from 4.4 to 12.4 years. Thus, the range was 12.4 4.4 8.0 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data lies within two standard deviations of the mean. Therefore, a 95% range of data values extending from u 20 to u used for "commonly occurring" data values. Note that the interval from u - 20 to l20 is 40 in length. This leads to a "rule of thumb" for estimating the standard deviation from a 95% range of data values. 20 is often Estimating the standard deviation For a symmetric, bell-shaped distribution, high value low value range standard deviation 4 4 where it is estimated that about 95% of the commonly occurring data values fall into this range Use this "rule of thumb" to approximate the standard deviation of x values, where x is the age (in years) at which a color TV is replaced. (Round your answer to one decimal place.) yrs (b) What is the probability that someone will keep a color TV more than 5 years before replacement? (Round your answer to four decimal places.) .9992 (c) What is the probability that someone will keep a color TV fewer than 10 years before replacement? (Round your answer to four decimal places.) 8413 (d) Assume that the average life of a color TV is 8.4 years with a standard deviation of 2.0 years before it breaks. Suppose that a company guarantees color TVs and will replace a TV that breaks while under guarantee with a new one. However, the company does not want to replace more than 6% of the TVs under guarantee. For how long should the guarantee be made (rounded to the nearest tenth of a year)? yrs 6.9 Need Help? Read It Talk to a Tutor Viewing Saved Work Revert to Last Response

61%9:15 PM Q STAT WA 7.3 Hmwk - Area X G hemoglobin - GoX + G somnelance - G X porp https://www.webassign.net/web/Student/Assig 0 Z Need Help? Read It Talk to a Tutor Viewing Saved Work Revert to Last Response 6. 0/1 points Previous Answers BBBasicStat8 7.3.031. My Notes Ask Your Teacher Suppose, household color TVs are replaced at an average age of u 8.4 years after purchase, and the (95% of data) range was from 4.4 to 12.4 years. Thus, the range was 12.4 4.4 8.0 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data lies within two standard deviations of the mean. Therefore, a 95% range of data values extending from u 20 to u used for "commonly occurring" data values. Note that the interval from u - 20 to l20 is 40 in length. This leads to a "rule of thumb" for estimating the standard deviation from a 95% range of data values. 20 is often Estimating the standard deviation For a symmetric, bell-shaped distribution, high value low value range standard deviation 4 4 where it is estimated that about 95% of the commonly occurring data values fall into this range Use this "rule of thumb" to approximate the standard deviation of x values, where x is the age (in years) at which a color TV is replaced. (Round your answer to one decimal place.) yrs (b) What is the probability that someone will keep a color TV more than 5 years before replacement? (Round your answer to four decimal places.) .9992 (c) What is the probability that someone will keep a color TV fewer than 10 years before replacement? (Round your answer to four decimal places.) 8413 (d) Assume that the average life of a color TV is 8.4 years with a standard deviation of 2.0 years before it breaks. Suppose that a company guarantees color TVs and will replace a TV that breaks while under guarantee with a new one. However, the company does not want to replace more than 6% of the TVs under guarantee. For how long should the guarantee be made (rounded to the nearest tenth of a year)? yrs 6.9 Need Help? Read It Talk to a Tutor Viewing Saved Work Revert to Last Response

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks