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    Normal Distribution

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    Nurses saleries are Normally distributed with mean of 35,000 and standard deviation$1700.
    A. What is the probability that a nurse earn more than $36,000?
    B. What is the probality that a group of 10 nurses have mean salary greater than $36,000?
    c. What salary does a nurse need to earn to have a salary in the top 25% of nurses' salaries?

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    Solution Preview

    A) first, calculate the z value by z = (X-M)/SD = (36000-35000)/1700= 0.588
    <br>then Pr(X>36000) = Pr(z>0.588) = 1- Pr(z<0.588) = 1-0.722 =0.278
    <br>z value is found from a z-table.
    <br>Therefore, the probability that a nurse earn more than $36,000 is ...

    Solution Summary

    Nurses salaries are Normally distributed with mean of $35,000 and standard deviation $1700.
    A. What is the probability that a nurse earn more than $36,000?
    B. What is the probality that a group of 10 nurses have mean salary greater than $36,000?
    c. What salary does a nurse need to earn to have a salary in the top 25% of nurses' salaries?

    $2.49

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