statistic
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $34,000 and a standard deviation of $2000. What is the cutoff salary for teachers in the bottom 10%?
asked by
shannen

Find a Percentile to ZScore Calculator. You can Google one, and likely there's a table of this in your text.
That'll tell you how many SD below the mean you have to go.
I make it about 1.28 standard deviations, so that'll be about 34,000  (1.28 * 2000)
posted by jim

Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $34,000 and a standard deviation of $2000. What is the cutoff salary for teachers in the bottom 10%?
posted by vickey

Answer: 31,440
posted by Sam
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