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SU17 ADMS2320 Chapter 10

Cara Chin 14 Fragen

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  1. 1Which of the following is not a characteristic for a good estimator?
    1. ABeing unbiased
    2. BBeing consistent
    3. CHaving relative efficiency
    4. DAll of these choices are true.
  2. 2A point estimator is defined as:
    1. Aa range of values that estimates an unknown population parameter.
    2. Ba range of values that estimates an unknown sample statistic.
    3. Ca single value that estimates an unknown population parameter.
    4. Da single value that estimates an unknown sample statistic.
  3. 3An unbiased estimator of a population parameter is defined as:
    1. Aan estimator whose expected value is equal to the parameter.
    2. Ban estimator whose variance is equal to one.
    3. Can estimator whose expected value is equal to zero.
    4. Dan estimator whose variance goes to zero as the sample size goes to infinity.
  4. 4An estimator is said to be consistent if:
    1. Ait is an unbiased estimator.
    2. Bthe variance of the estimator is zero.
    3. Cthe difference between the estimator and the population parameter stays the same as the sample size grows larger.
    4. Dthe difference between the estimator and the population parameter grows smaller as the sample size grows larger.
  5. 5If there are two unbiased estimators of a population parameter available, the one that has the smallest variance is said to be:
    1. Aa biased estimator.
    2. Brelatively efficient.
    3. Cconsistent.
    4. Drelatively unbiased.
  6. 6Which of the following statements is correct?
    1. AThe sample mean is an unbiased estimator of the population mean.
    2. BThe sample proportion is an unbiased estimator of the population proportion.
    3. CThe difference between two sample means is an unbiased estimator of the difference between two population means.
    4. DAll of these choices are true.
  7. 7Which of the following statements is true?
    1. AThe sample mean is relatively more efficient than the sample median.
    2. BThe version of the sample variance where you divide by n is biased.
    3. CThe sample mean is consistent.
    4. DAll of these choices are true.
  8. 8The problem with relying on a point estimate of a population parameter is that:
    1. Ait is virtually certain to be wrong.
    2. Bit doesn't have the capacity to reflect the effects of larger sample sizes.
    3. Cit doesn't tell us how close or far the point estimate might be from the parameter.
    4. DAll of these choices are true.
  9. 9The sample variance s2 is an unbiased estimator of the population variance 2 when the denominator of s2 isBild zu Frage 9
    1. ABild zu Antwort A
    2. BBild zu Antwort B
    3. CBild zu Antwort C
    4. DBild zu Antwort D
  10. 10The librarian at the Library of Congress has asked her assistant for an interval estimate of the mean number of books checked out each day. The assistant took a sample and found the mean to be 880 books. She provides the librarian with an interval estimate of between 790 and 970 books checked out per day. An efficient, unbiased point estimate of the number of books checked out each day at the Library of Congress is:
    1. A790
    2. B880
    3. C90
    4. DNone of these choices.

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Beschreibung
Business/Economics Quiz am SU17 ADMS2320 Chapter 10, erstellt von Cara Chin am 25/06/2017.
Sprache
English
Aufrufe
7
Schlagwörter
business/economics
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