The amount of time that a customer spends waiting at an airport check-in counter is a randomvariable with mean 8.2 minutes and standard deviation 1.7 minutes. Suppose that a randomsample of n = 47 customers is observed. Find the probability that the average time waiting in linefor 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(b) The probability is i(c) The probability is i

It is given that Mean = 8.2, And SD = 1.7 Sample size n = 47 Let M denote the average waiting time…

Answered: The amount of time that a customer…

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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Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is 185000 dollars. Assume the standard deviation is 36000 dollars. Suppose you take a simple random sample of 59 graduates.Find the probability that a single randomly selected salary is at most 187000 dollars. Answer = Find the probability that a sample of size n=59n=59 is randomly selected with a mean that is at most 187000 dollars. Answer = Enter your answers as numbers accurate to 4 decimal places.
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For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 515 and a standard deviation of 170. The grading process of this year's exam has just begun. The mean score of the 35 exams graded so far is 518. What is the probability that a sample of 35 exams will have a mean score of 518 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.
For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 515 and a standard deviation of 175. The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 518. What is the probability that a sample of 40 exams will have a mean score of 518 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places. Sub Continue
A manufacturer knows that their items have a normally distributed length, with a mean of 16.1 inches, and standard deviation of 5.2 inches.If 22 items are chosen at random, what is the probability that their mean length is less than 13.4 inches?
A manufacturer knows that their items have a normally distributed length, with a mean of 6.7 inches, and standard deviation of 2.1 inches.If 21 items are chosen at random, what is the probability that their mean length is less than 6.9 inches?
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