A blood bank is conducting a study on how much time is required of their patients for blood plateletdonations. Based on past records, time spent in the waiting room has a mean of 5 minutes and astandard deviation of 1 minute, time spent with a nurse who reviews patients' medical records andmeasures their vital signs has a mean of 10 minutes and a standard deviation of 3 minutes, and theactual donation time has a mean of 130 minutes and a standard deviation of 8 minutes. Assumingthese three times are independent and can all be modeled using a normal distribution, approximatelywhat proportion of donors finish the entire donation process in under 2.5 hours (150 minutes)?(A) 0.66(B) 0.72(C) 0.84(D) 0.89(E) 0.99

The objective of the question is to find the proportion of donors who finish the entire donation…

Answered: A blood bank is conducting a study on…

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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In a certain country the heights of adult men are normally distributed with a mean of 68.8 inches and a standard deviation of 2.4 inches. The country's military requires that men have heights between 65 inches and 77 inches. Determine what percentage of this country's men are eligible for the military based on height.
Small newborn seal pups have a lower chance of survival. Suppose the length of pups was found to follow a Normal distribution with a mean of 29.5 inches and a standard deviation of 1.2 inches. What percentage of seal pups are between 29.5 and 32 inches?
The combined SAT scores for the students at a local high school are normally distributed with a mean of 1521 and a standard deviation of 301. The local college includes a minimum score of 888.9 in its admission requirements. What percentage of students from this school earn scores that fail to satisfy the admission requirement?
A Statistics instructor wanted to compare the scores on the same final exam given to students at a local community college and local university. The Statistics instructor feels that students at the community college would be better prepared and have higher exam scores on the final exam. After grading the final exams from both institutions, the Statistics instructor found that for a sample of 36 community college students, the sample had a mean score of 84 with a standard deviation of 3.4. A sample of 45 university students had a mean score 79 with a standard deviation of 2.6. Construct a 95% confidence interval for the difference between population mean exam scores. Round your final results to one decimal place. _____________ ≤ ??? − ????? ≤ ______________
If this 3-year-old boy grows up to be a man with a height at the same percentile, what will his height be? Use a population mean of 70 inches and a population standard deviation of 3 inches
The speed of cars driving past Johnson City High School, on 666 Reynolds Rd, were recorded over one school year. The speed limit on that part of Reynolds Rd is 20 mph. The mean of the speed readings was 24.19 mph, with a standard deviation of 3.56 mph.
According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the standard deviation is 3 inches. If Zsike is 67 inches tall, what is her z-score?
A mechanical device has a wear out time that is normally distributed with a mean of 1100 hours and a standard deviation of 50 hours. Find the percentage of devices that will have a wear out time of between 1000 hours and 1075 hours.
According to a marketing website, adults in a certain country average 51 minutes per day on mobile devices this year. Assume that minutes per day on mobile devices follow the normal distribution and has a standard deviation of 7 minutes. What amount of time spent today on mobile devices by an adult represents the 80th percentile?
According to a recent report the battery life for a new line of laptop computers has a mean of 9 hours with a standard deviation of 2.4 hours. If battery life is normally distributed what percentage of new laptops will last between 8 and 11 hours on a single charge?
The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.5 miles per gallon. What proportion of hybrids gets over 61 miles per gallon?
The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation of $24,300. What should be the hourly wage for an administrator if he/she wishes to earn less than 25% of all employees?

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