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    Prob/Stat Questions

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    10. and 11. For a population with mean of 14 and standard deviation of 2.5 ...

    How many standard deviations is 16.5 from the mean?
    What number is -3.1 standard deviations from the mean?

    12. Find the cumulative area under a standard normal curve that corresponds to a z-score of 2.25.

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    Solution Preview

    10. Subtract 14 from 16.50:

    16.50 - 14 = 2.5 (i.e. 1 standard deviation)

    The number 16.5 is 1 standard deviation ...

    Solution Summary

    This problem set has three questions that involve means, standard deviations, and z-scores.