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An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months. 1. Determine the proportion of scanners that can be expected to fail before 38 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 2. Determine the proportion of scanners that can be expected to still work after 45 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 3. Determine the proportion of scanners that can be expected to still work after 39 years. a. 30.85% b. 19.15%

An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months. 1. Determine the proportion of scanners that can be expected to fail before 38 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 2. Determine the proportion of scanners that can be expected to still work after 45 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 3. Determine the proportion of scanners that can be expected to still work after 39 years. a. 30.85% b. 19.15%

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months. 1. Determine the proportion of scanners that can be expected to fail before 38 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 2. Determine the proportion of scanners that can be expected to still work after 45 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 3. Determine the proportion of scanners that can be expected to still work after 39 years. a. 30.85% b. 19.15% C. 50.00% d. 80.85% e. 69.15% 4. Within what amount of time would 95.05% of the scanners have failed? a. 23.6 years b. 34.4 years c. 45.1 years d. 44.8 years e. 47.6 years
Transcribed Image Text:An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months. 1. Determine the proportion of scanners that can be expected to fail before 38 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 2. Determine the proportion of scanners that can be expected to still work after 45 years. a. 34.13% b. 18.57% c. 50.00% d. 22.66% e. 27.34% 3. Determine the proportion of scanners that can be expected to still work after 39 years. a. 30.85% b. 19.15% C. 50.00% d. 80.85% e. 69.15% 4. Within what amount of time would 95.05% of the scanners have failed? a. 23.6 years b. 34.4 years c. 45.1 years d. 44.8 years e. 47.6 years
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