Question

The average teachers' salary in a certain state is $57,337. Suppose that the distribution of salaries is normal with a standard deviation of $7500. Assume that the sample is taken from a large population and the correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus calculator and round the answer to at least four decimal places.

If we sample 55 teachers' salaries, what is the probability that the sample mean is less than $55,700?

Answer #1

**=NORM.S.DIST(-1.6187, TRUE)**" to
find the probability.

The average teachers' salary in a certain state is $57,337.
Suppose that the distribution of salaries is normal with a standard
deviation of $7500. Assume that the sample is taken from a large
population and the correction factor can be ignored. Use a TI-83
Plus/TI-84 Plus calculator and round the answer to at least four
decimal places.
What is the probability that a randomly selected teacher makes
less than $51,000 per year?

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the correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus
calculator and round the final answers to at least four decimal...

Software analysis of the salaries of a random sample of 251
teachers in a particular state produced the confidence interval
shown below. Determine if the following conclusions are correct.
If not, state what is wrong with the conclusion. Complete parts a
through e below. t-interval for mu : with 99 % confidence,
43623 less thanmu(TchPay)less than45465
a) If many random samples of 251 teachers from this state were
taken, about 99 out of 100 of them would produce this...

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In New York State, the mean salary for high school teachers in
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The average teacher's salary in Connecticut (ranked first among
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normal with a standard deviation of $7500.What is the probability
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year?

Data on salaries in the public school system are published
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C) Find the 41st percentile of X rounded to at least two
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a)
Is it appropriate to use...

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