12. Teachers' Salaries in North Dakota The average teacher's salary in North Dakota is $37,764. Assume a normal distribution with o = $5100. a. What is the probability that a randomly selected teacher's salary is greater than $45,000? b. For a sample of 75 teachers, what is the probability that the sample mean is greater than $38,000?
12. Teachers' Salaries in North Dakota The average teacher's salary in North Dakota is $37,764. Assume a normal distribution with o = $5100. a. What is the probability that a randomly selected teacher's salary is greater than $45,000? b. For a sample of 75 teachers, what is the probability that the sample mean is greater than $38,000?
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Transcribed Image Text:12. Teachers' Salaries in North Dakota The average
teacher's salary in North Dakota is $37,764. Assume a
normal distribution with o = $5100.
a. What is the probability that a randomly selected
teacher's salary is greater than $45,000?
b. For a sample of 75 teachers, what is the probability
that the sample mean is greater than $38,000?
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