The physical plant at the main campus of a large state university recieves daily requests toreplace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 41 and a standard deviation of 7. Using the 68-95-99.7 rule,what is the approximate percentage of lightbulb replacement requests numberingbetween 27 and 41?Do not enter the percent symbol.ans =

Answered: Image /qna-images/answer/25d1b471-7de8-4263-911d-d152f72ee654.jpg

Answered: The physical plant at the main campus…

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...

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Similar questions

The age of student at a university are normally distributed with a mean of 20. What percentage of the student body is at least 20 years old?
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According to the Department of Education the mean number of hours college students spend studying each week follows a normal distribution with a mean of 20 hours and standard deviation of 9 hours. What ‘hours of study’ represents the 90th percentile? What ‘hours of study’ represents the 15th percentile?
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
According to data for a population, 3-year-old boys have a mean height of 39 inches and a standard deviation of 2 inches. Assume the distribution is approximately Normal. Find the percentile measure for a height of 41 inches for a 3-year-old boy
The mean height of male college students in a large city is 68 inches and the standard deviation is 5 inches. What height would a male college student must have in order for the student's height to be the cutoff point for the 95th percentile? (What is the lowest height in the top 5%?)
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 71 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 62 miles per hour and 80 miles per hour. Assume the data set has a bell shaped distribution.
The average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs are normally distributed. What is the range for the middle 50% of repair costs for microwave ovens? Label.
The ages of the employees at Solar Systems, Inc. is normally distributed with a mean of 32.7 years and a standard deviation of 1.8 years. What percentage of employees at Solar Systems, Inc. are younger than 30 years old? Round your answer to the nearest tenth of a percent.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 119.5-cm and a standard deviation of 2.2-cm. For shipment, 24 steel rods are bundled together.Find P75, which is the average length separating the smallest 75% bundles from the largest 25% bundles.P75 = -cm
According to the Department of Education the mean number of hours college students spend studying each week follows a normal distribution with a mean of 28 hours and standard deviation of 6 hours. What ‘hours of study’ represents the 95th percentile? What ‘hours of study’ represents the 15th percentile?
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