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    A student's grade on an exam

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    1) A student's grade on an exam was transformed to a z-value which is negative. therefore, we know that he or she scored:
    Choices: higher 16% of class, higher than 45% of class, above the first quartile, below the mean, lower than 16% of the class.
    I think is is the lower than 16% of the class.

    2) Which of one of the following sampling examples would generally lead to the least reliable statistical inferences about the population from which the sample has been selected?
    A random sample selected without replacement
    A random sample selected with replacement
    a voluntary response sample
    a systematic sample.

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    Solution Preview

    1) it is "below the mean" - if a Z score is negative it only tells ...

    Solution Summary

    The expert examines the student's grades on an exam.