3. The average time it takes for a Conancorp unpaid intern to run fourteen stories of stairs to get theirmanager a coffee is 7 minutes, with a standard deviation of 0.7 minutes. If we select 4 interns at random,what is the probability that their average time will be between 6 minutes and 6.4 minutes?(a) 8.8%(b) 4.2%(c) 3.9%

Answered: The average time it takes for a…

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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Similar questions

daily revenue of a computer repair shop is known to be normally distributed with a mean of $7129 and a st. dev. of $1139. the owner monitors the daily revenue totals for a sample of 35days. what is the probability the mean daily revenue is greater than $6681? answers to 4 decimal places.
A department store manager has monitored the number of complaints received per week about poor service. The probabilities for numbers of complaints in a week, established by this review, are shown in the table. Number of complaints Probability 0 0.16 1 0.26 2 0.35 week? 3 0.10 4 0.08 5 0.05 What is the standard deviation of complaints received per Please round your answer to the nearest hundredth. Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.
It is flu season again. On average 549 UCI students get sick, with a standard deviation of 30 students. If there are 600 or more students who get sick, there is an epidemic. What is the probability there will be an epidemic?
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?
Just do subpart "b"
Business weekly conducted a survey of graduates for 30 top MBA programs. On the basis of the survey assume the means annual salary 10 years after graduation is $162,000. Assume the standard deviation is $40,000. Suppose you take a simply random sample of 39 graduates. For a single randomly selected graduate, find the probability that her salary is between $156,692.00 and $161,395.00. For a simple random sample of 39 graduates, find the probability that the average salary is between $156,692.00 and $161,395.00. Is the assumption of normal necessary? Yes, or No.
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?
3. After being nominated for an MTV Music Award, the probability of winning is 22%. If Ariana Grande has been nominated for five awards, what is the chance that she will win at least one award? How many awards should she expect to win? What is the standard deviation associated with this probability?
Nine hundred and thirty-two businessmen accepted the Mayaman Challenge of one of the Philanthropic Filipinos who are willing to give relief goods for our fellow Filipinos affected by the recent pandemic. They will be contributing an average of 135 sacks of rice with a standard deviation of 15 sacks of rice. 10. What is the probability that the businessman will contribute less than 105 sacks of rice? A. 98% B. 97.72% C. 2.28% D. 2.0% 11. What is the probability that the business man will contribute more than 150 sacks of rice? A. 15.87% B. 76.45% C. 80.78% D. 84.13% 12. How many businessman will contribute a sack of rice between 105 sacks to 145 sacks? A. 534 B. 653 C. 676 D. 726

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