Scores of each of the Knitting Aptitude tests were normally distributed witha mean of 6 hours and a standard deviation of 1.67 hours. Carrie will betaking the test tomorrow. Assume the data is normally distributed.Determine the probability of someone finishing in less than 2.17 hours0.98910.50001.00.0109

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Answered: Scores of each of the Knitting Aptitude…

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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Jeremiah earned a score of 530 on Exam A that had a mean of 450 and a standard deviation of 40. He is about to take Exam B that has a mean of 63 and a standard deviation of 20. How well must Jeremiah score on Exam B in order to do equivalently well as he did on Exam A? Assume that scores on each exam are normally distributed.
Assume that adults have IQ scores that are normally distributed with a mean of 97.9 and a standard deviation of 24.8. Find the probability that a randomly selected adult has an IQ greater than 135.8. The probability that a randomly selected adult from this group has an IQ greater than 135.8 is?
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P42, the 42-percentile. This is the temperature reading separating the bottom 42% from the top 58%. P42 = °C
IQ scores are normally distributed with a mean of 100 and standard devation of 15. find the probability of having an IQ between 136 and 142.
Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees and standard deviation of 1.00degreesC. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to Upper P 90, the 90th percentile. This is the temperature reading separating the bottom 90% from the top 10%.
Assume that adults have scores that are normally distributed with a mean of 100 and a standard deviation of 15. For a randomly selected adult, find the indicated probability. Round to 4 decimals. Find the probability of a score greater than 70.
The average amount of money spent for lunch per person in the college cafeteria is $5.99 and the standard deviation is $2.1. Suppose that 49 randomly selected lunch patrons are observed. Assume the distribution of money spent is normal, and round all answers to 4 decimal places where possible. For the group of 49 patrons, find the probability that the average lunch cost is between $5.77 and $6.08.
Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?
The weight of garbage produced per household per week has an average value of approximately 9.3 pounds. The standard deviation of garbage per household per week has been measured to be 2.7 pounds. You have a garbage hauling company and need to know the probability of hauling heavy loads of garbage. How would you calculate the probability that your company will be hauling garbage loads greater than 12 pounds per household during a weekly pick-up? probability. Set up your calculation correctly. You DO NOT need to calculate the
Write down the formulas for the standard deviation of p.
The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the standard deviation is σ = 4 years, what is the probability of a person living to at least 92 years of age?
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P70, the 70-percentile. This is the temperature reading separating the bottom 70% from the top 30%.P70 = °C

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