Weekly Salaries of Teachers - Normal Distribution

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• Assume the distribution is normal.

  The average weekly income of teachers in one school district is $390 with a standard deviation of $45.

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  The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45. a. What is the probability that a randomly selected teacher earns more than $525 per week? b.

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  The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45. What is the probability that a randomly selected teacher earns more than $525 a week? 4.

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  Find the indicated probability. 5) The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45.

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  If new samples of 100 women are selected, what range of weekly salaries to the nearest dollar marks the 98% confidence interval? See the attachment.

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  62) ______ A) 35.31% B) 9.18% C) 90.82% D) 40.82% 63) The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45.