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    normal distribution and z-score

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    The standard normal table shows an area value of 0.1 for a z-score of 0.25 and an area value of 0.35 for a z-score of 1.04. What percentage of the observations of a random variable that is normally distributed will fall between 0.25 standard deviations below the mean and 1.04 standard deviations above the mean?

    a. 25%
    b. 35%
    c. 45%
    d. 55%

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    Solution Summary

    It investigates the relationship between the z-score and probability of the normal distribution.