A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Suppose that, on average, electricians earn approximately u = $54,000 per year in the United States. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is o = $12,000. What is the probability that the average salary of four randomly selected electricians is less than $50,000? O 0.3707 O 0.7486 O 0.6293 0.2514
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Transcribed Image Text:Suppose that, on average, electricians earn approximately u = $54,000 per year in the United States. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is o = $12,000. What is the probability that the average salary of four randomly selected electricians is less than $50,000? O 0.3707 O 0.7486 O 0.6293 0.2514
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