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%
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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