Problem No.9A class in Engineering Data Analysis for CE is composed of 10 juniors, 30 seniors, and 10graduate students. The final grades show that 3 of the juniors, 10 of the seniors, and 5 of thegraduate students received 1.00 for the course. If a student is chosen at random from thisclass and is found to have earned 1.00, what is the probability that he or she is a senior?

Answered: Problem No.9 A class in Engineering…

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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QUESTION 8 You are given the following table with joint probabilities for X and Y (i.e. bivariate probability distribution). 0.12 0.42 0.06 0.6 0.3 0.1 y 1 0.21 0.06 0.03 0.07 0.02 0.01 0.4 0.5 0.1 1.00 The expected value of Y is: E[Y] = 0×0.3 + 1×0.6 + 2×0.1 = 2.90 O True O False o o o
QUESTION 1 The number of car accidents in small city caused by reckless drivers has heighted concern over the road safety. The traffic authorities of the city recorded a daily average of two such accidents. The probability that a) There are less than 3 accidents in a single day b) There are at least 5 accidents in three days
Question 1 According to the Chronicles of Contrived Statistics (March, 2016), the probability that scientists from Area 51 will begin selling pet aliens in the next month is 20%. The probability that either Elon Musk will offer you a free trip to space or that scientists will begin sales of pet aliens next month is 43%. Finally, they list that probability of both happening in the next month is 13%. What is the probability that Elon Musk will offer you a free trip into space in the next month? Round to two decimal places as needed.
Question 5: According to the Pew Internet & American Life Project, 54% of Internet users have a wireless connection to the Internet via a laptop, cell phone, game console, or other mobile device. Given that users have a wireless, 25% use Twitter to share updates about themselves. What is the probability that an Internet user has a wireless connection and also uses Twitter? O 54% +25% -79% 25%/54%-46.3% 54%/25%-2.16 54% 25 % -13.5%
QUESTION 11 A critical thinking professor asked her students to indicate whether they believed each of two headlines. One headline was false, and the other was true, but the students did not know this. The probability that a student selected at random believed the true headline was 89% and the probability that the student believed the false headline was 85%. She found that 7896 of the students believed both headlines. a. In this sample, are the events "believed the false headline" and "believed the true headline" mutually exclusive? Explain b. Find the probability that a randomly selected student from this sample believed the true headline OR believed the false headline. T TTT Paragraph Arial 3 (12pt) T O Mashups HTML CSS Words:0 Path: p Click Save and Submit to save and submit. Click Sae All Answers to save all answers. >8 0
Question 13, section 4.2
Question 2: You are appointed as a quality engineer in a telecommunication company. Your manager asks you to enhance the company quality of service, by increasing the success rate for customers to get hold of tech support representatives. Assume that customers will call three times is an attempt to ask for tech support then give up. You want to make sure that you are able to serve at least 97% of the people who ask for tech support. Let p be the probability that a caller get hold of a tech support representative. What is the minimum value of p necessary to meet your goal?
Question 1 A store-bought pregnancy test produces a correct result 99% of the time when a woman is actually pregnant but is only 97% accurate when a woman is not pregnant. What are the chances of a false positive and a false negative respectively? Question 2 Assuming a woman has a 90% chance of actually being pregnant when she takes the test, and that she takes TWO tests (requiring the same signal from both tests to either confirm OR reject) what is the probability of she will get a "double positive" result? Also, what is the probability of an "uncertain" result (one of each)?
QUESTION 2 It is known that 14.5% of adult men in the United States are 6 ft tall or taller. Assume that the heights of adult men in the United States are independent of each other. Suppose a random sample of 8 adult men in the United States is taken. What is the probability that 2 or 3 men in the sample are 6 ft tall or taller? O A. 0.208 OB. 0.308 OC. 0.408 O D. 0.508
QUESTION 10 The Career Center at NTU compiled the following table on the number of students who have a part-time job and their major: Part-tim Work No Yes Accounting 117 25 Major Computer Engineering 46 58 Human Resources 130 50 What is the probability that a randomly selected student who is not working is majoring in computer engineering? Round your answer to four decimal places.

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