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Math Help - statistics and probability

  1. #1
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    statistics and probability

    hi every one .....hope all of u will be fine...i'm in a problem i need you help plz help me....the questions are in the atteched file.
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  2. #2
    Grand Panjandrum
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    2.a Why we call the standard deviation of the sample statistic as standard error of the statistic?
    It's not a rigid thing, in fact I have just had a referees report back on a paper of mine where s/he has changed standard error to standard deviation throughout.

    But I'm sure that your notes tell you why the standard deviation of an estimator is called the standard error, at least for the purposes of your course.

    RonL
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  3. #3
    Grand Panjandrum
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    For question 1 ask yourself two questions:

    1. Are the two estimators unbiased?
    2. If they are unbiased which has the smaller standard deviation? If one or both are biased which has the least mean square error?

    RonL
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