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Teachers' Salaries in Connecticut The average teacher's salary in Connecticut (ranked first among states) is $57,337. Suppose that the distribution of salaries is normal with a standard deviation of $7500. a. What is the probability that a randomly selected teacher makes less than $52,000 per year?

Teachers' Salaries in Connecticut The average teacher's salary in Connecticut (ranked first among states) is $57,337. Suppose that the distribution of salaries is normal with a standard deviation of $7500. a. What is the probability that a randomly selected teacher makes less than $52,000 per year?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
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10. Teachers' Salaries in Connecticut The average teacher's salary in Connecticut (ranked first among states) is $57,337. Suppose that the distribution of salaries is normal with a standard deviation of $7500. a. What is the probability that a randomly selected teacher makes less than $52,000 per year?
Transcribed Image Text:10. Teachers' Salaries in Connecticut The average teacher's salary in Connecticut (ranked first among states) is $57,337. Suppose that the distribution of salaries is normal with a standard deviation of $7500. a. What is the probability that a randomly selected teacher makes less than $52,000 per year?
b. If we sample 100 teachers' salaries, what is the probability that the sample mean is less than $56,000?
Transcribed Image Text:b. If we sample 100 teachers' salaries, what is the probability that the sample mean is less than $56,000?
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