8. At Betropolis U. the scores of the History Exam are a Triangular Distribution with a low of 0 and a high of 100 and a most likely score of 70 (the mode). a. What is the probability that a student got an A; that is scored between 90 and 100? You answer should be correct to 3 places after the decimal point. b. What is the Expected value of the Random Variable? Your answer should be correct to 3 places after the decimal point.

8. At Betropolis U. the scores of the History Exam are a Triangular Distribution with a low of 0 and a high of 100 and a most likely score of 70 (the mode). a. What is the probability that a student got an A; that is scored between 90 and 100? You answer should be correct to 3 places after the decimal point. b. What is the Expected value of the Random Variable? Your answer should be correct to 3 places after the decimal point.

Name: 8. At Betropolis U. the scores of the History Exam are a TriangularDi
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Description: 8. At Betropolis U. the scores of the History Exam are a TriangularDistribution with a low of 0 and a high of 100 and a most likely scoreof 70 (the mode).a. What is the probability that a student got an A; that is scoredbetween 90 and 100? You answe

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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According to a 2009 Reader's Digest article, people throw away about 14% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 134 grocery shoppers to investigate their behavior. What is the probability that the sample proportion does not exceed 0.08? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.)
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Based on historical data, your manager believes that 40% of the company's orders come from first- time customers. A random sample of 223 orders will be used to estimate the proportion of first- time-customers. What is the probability that the sample proportion is between 0.24 and 0.43? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.) Question Help: Message instructor Submit Question 80 888 F2 F3 F4 F5 F6 F7 F8 @ $ & 2 8. < CO # 3
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Based on historical data, your manager believes that 43% of the company's orders come from first- time customers. A random sample of 90 orders will be used to estimate the proportion of first-time- customers. What is the probability that the sample proportion is between 0.3 and 0.44? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.) Question Help: Message instructor Submit Question Previous 80 888 F3 F4 F5 F6 F7 F8 F9 $ & 2 4 6. 7 8. W E Y U J K この # 3
Is the expected value (mean) of the probability distribution of a random variable always one of the possible values of x from the distribution ? Explain
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