Assuming the estimator is unbiased, the typical point estimate a. equals precise

Question

Assuming the estimator is unbiased, the typical point estimate a. equals precisely the true value of the parameter that is being estimated. b. is almost certain to lie below or above the true value of the parameter that is being estimated. c. equals the corresponding interval estimate. d. invariably validates Chebyshev's theorem. 20. A summary measure based on sample data is a. called a statistic. b. designated by Roman letters (such as X for mean or P for proportion). c. correctly described by (a) and (b). d. called a parameter.

Explanation / Answer

19.

If an estimator is unbiased, then it targets the value of the parameter, so

OPTION A: Equals precisely the true value of the parameter that is being estimated.

[It doesn't always equal the parameter; it just targets the parameter. The second best answer is option B, but I am going for A.]

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20.

Statistics are for samples (Roman letters), and parameters are for populations (Greek letters).

OPTION C: correctly described by a) and b). [ANSWER]

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