* Incorrect.The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.1 minutes andstandard deviation 1.5 minutes. Suppose that a random sample of = 47 customers is observed. Find the probability that the averagetime waiting in line for these customers is(a) Less than 10 minutes(b) Between 5 and 10 minutes(c) Less than 6 minutesRound your answers to four decimal places (e.g. 0.9876).(a) The probability is i 0.8974(b) The probability is i0.8780(c) The probability is i 0.0808Statistical Tables and Charts

If Xi's are iid random variables with common mean μ and common sd σ then, X ~a N(μ, σn), for…

Answered: The amount of time that a customer…

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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The life expectancy of poople in Oman is if the mean distributed. maly years and 6) years nor and standeard'deviation is (106) respectively, Find the probability that the life expectancy is between (104) and (76) gears
The number of customers at a local Lowe’s store during a given weekend is normally distributed with a mean of 5000 with a standard deviation of 1500. What is the probability that a particular store has at least 7000 customers this weekend? (please round your answer to 4 decimal places)
A bus heading to university is always scheduled to arrive at a certain bus stop at 7:30am. The difference between the actual arrival time and 7:30am is normally distributed with mean 0 and standard deviation of 2 minutes.A student who always has a class at 8am decided to be at the bus stop at 7:28am in order to try to guarantee catching this bus. What is the probability that the student will catch the bus on any particular day?Probability = What is the probability that the student will catch the bus at least 4 times out of 5 days?Probability =
About 78% of all female heart transplant patients will survive for at least 3 years seventy female transplant patients are randonly selected. What is the probability that the sample proportion surving for at least 3 years will be less than 72%? Assume the sampling distribution of sample proportions is a normal distribution. The mean of the sample proportion is equal to the population proportion and the standard deviation is equal to pq/n. The probability that the sample proportion surviving for at least 3 years will be less than 72% is ____________. Round answer to four decimal places.
Assume that the square footage of a residential house in the US is normally distributed with a mean=1000 and standard deviation=150 square feet. If we select a random house what is the probability that it will be at most 1050 square feet?
What is the probability that 46 cars chosen at random will have a mean load weight x of less than 85.5 tons of coal if the mean is 86 and standard deviation 1.4
Suppose Kristen is researching failures in the restaurant business. In the city where she lives, the probability that an independent restaurant will fail in the first year is 51%.51%. She obtains a random sample of 84 independent restaurants that opened in her city more than one year ago and determines if each one had closed within a year. What are the mean and standard deviation of the number of restaurants that failed within a year? Please give your answers precise to two decimal places.
The average number of shoppers at a particular grocery store in one day is 505, and the standard deviation is 115. The number of shoppers is normally distributed. For a random day, what is the probability that there are between 200 and 400 shoppers at the grocery store? The answer should be typed as a decimal with 4 decimal places.
The mean total cholesterol for a population of men between the ages of 20 and 29 is 180 micrograms per decilitre with a standard deviation of 37.4. A healthy total cholesterol level is less than 200, 200-240 is border line, and above 240 is dangerous. Assume the distribution is approximately Normal. For a randomly selected man from this group, what is the probability that his total cholesterol level is 200 or more? Between 200 and 240? On a standardized test, scores are normally distributed with a mean of 400 and a standard deviation of 80. What score must one have to be in the 80th percentile?
Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 48 minutes and standard deviation 23 minutes. A researcher observed 14 students who entered the library to study. Round all answers to 4 decimal places where possible. If one randomly selected student is timed, find the probability that this student's time will be between 42 and 50 minutes. For the 14 students, find the probability that their average time studying is between 42 and 50 minutes. Find the probability that the randomly selected 14 students will have a total study time less than 714 minutes.
The time required to complete a final examination in a particular forestry subject is normally distributed, with a mean of 100 minutes and a standard deviation of 15 minutes. What is the probability of the following? (a) A student will complete the exam in at most 90 minutes? (b) A student will complete the exam in more than 75 minutes but less than 95 minutes? (c) Assume that the class has 60 students and that the examination period is 2 hours in length. How many students do you expect will be unable to complete the exam in the allotted time?
Find probability cholesterol is between 300 & 400 Round to 3 decimal place

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