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    Type I error, Type II error, confidence interval

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    1. A Type II error is committed when
    a) we reject a null hypothesis that is true.
    b) we don't reject a null hypothesis that is true.
    c) we reject a null hypothesis that is false.
    d) we don't reject a null hypothesis that is false.

    2. A Type I error is committed when
    a) we reject a null hypothesis that is true.
    b) we don't reject a null hypothesis that is true.
    c) we reject a null hypothesis that is false.
    d) we don't reject a null hypothesis that is false.

    3. An economist is interested in studying the incomes of consumers in a particular region. The population standard deviation is known to be $1,000. A random sample of 50 individuals resulted in an average income of $15,000. What is the upper end point in a 99% confidence interval for the average income?
    a) $15,052
    b) $15,141
    c) $15,330
    d) $15,364

    I need detail explanation.

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    Solution Preview

    1. A Type II error is committed when

    a) we reject a null hypothesis that is true.
    b) we don't reject a null hypothesis that is true.
    c) we reject a null hypothesis that is false.
    d) we don't reject a null hypothesis that is false.

    Answer: a) we reject a null hypothesis that is true.

    Accept Ho Reject Ho
    Ho is True Correct Decision "Type I Error
    "
    Ho is False "Type II Error
    " Correct Decision

    2. A Type I error is committed ...

    Solution Summary

    Answers 3 multiple choice questions on Type I error, Type II error, confidence interval.

    $2.19

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