The average annual salary for all U.S. teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5,680. What is the probability that a randomly selected teacher earns between $35,000 and $45,000 a year? What is the probability that a randomly selected teacher earns more than $40,000 a year?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
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The average annual salary for all U.S. teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5,680. What is the probability that a randomly selected teacher earns between $35,000 and $45,000 a year? What is the probability that a randomly selected teacher earns more than $40,000 a year?

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