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The shape of the distribution of the time required to get an oil change at a 20-minute oil-change facility is unknown. However, records indicate that the mean time is 21.2 minutes, and the standard deviation is 3.2 minutes. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1), Click here to view the standard normal distribution table (page 2). (b) What is the probability that a random sample of n= 40 ol changes results in a sample mean time less than 20 minutes? The probability is approximately 0.0089. (Round to four decimal places as needed.) (c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saday, the ol-change facility will perform 40 oil changes The the goal sbe s tOL chance of heing at or hel

The shape of the distribution of the time required to get an oil change at a 20-minute oil-change facility is unknown. However, records indicate that the mean time is 21.2 minutes, and the standard deviation is 3.2 minutes. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1), Click here to view the standard normal distribution table (page 2). (b) What is the probability that a random sample of n= 40 ol changes results in a sample mean time less than 20 minutes? The probability is approximately 0.0089. (Round to four decimal places as needed.) (c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saday, the ol-change facility will perform 40 oil changes The the goal sbe s tOL chance of heing at or hel

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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Question 8 ( C )
The shape of the distribution of the time required to get an oil change at a 20-minute oil-change facility is unknown. However, records indicate that the mean time is 21.2 minutes, and the standard deviation is 3.2 minutes. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1), Click here to view the standard normal distribution table (page 2), (b) What is the probability that a random sample of n= 40 oil changes results in a sample mean time less than 20 minutes? The probability is approximately 0.0089 . (Round to four decimal places as needed.) (c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saday, the oil-change facility will perform 40 oil changes between 10 AM. and 12 PM. Treating this as a random sample, at what mean oil-change time would there be a 10% chance of being at or below? This will be the goal established by the manager. There would be a 10% chance of being at or below minutes. (Round to one decimal place as needed.) Clear All Check Answer Help Me Solve This View an Example Get More Help - Next Previous Aa etv MacBook Air delete 8 9 6 P Y J K L G н ? N command option V • Σ 3:
Transcribed Image Text:The shape of the distribution of the time required to get an oil change at a 20-minute oil-change facility is unknown. However, records indicate that the mean time is 21.2 minutes, and the standard deviation is 3.2 minutes. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1), Click here to view the standard normal distribution table (page 2), (b) What is the probability that a random sample of n= 40 oil changes results in a sample mean time less than 20 minutes? The probability is approximately 0.0089 . (Round to four decimal places as needed.) (c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saday, the oil-change facility will perform 40 oil changes between 10 AM. and 12 PM. Treating this as a random sample, at what mean oil-change time would there be a 10% chance of being at or below? This will be the goal established by the manager. There would be a 10% chance of being at or below minutes. (Round to one decimal place as needed.) Clear All Check Answer Help Me Solve This View an Example Get More Help - Next Previous Aa etv MacBook Air delete 8 9 6 P Y J K L G н ? N command option V • Σ 3:
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