An unbiased estimator of a population parameter is defined as:
a. an estimator whose expected value is equal to the parameter.
b. an estimator whose variance is equal to one.
c. an estimator whose expected value is equal to zero.
d. an estimator whose variance goes to zero as the sample size goes to infinity.
Q. 2We check for normality by drawing a pie chart of the residuals.
Indicate whether the statement is true or false
Q. 3Which of the following is a characteristic for a good estimator?
a. Being unbiased c. Having relative efficiency
b. Being consistent d. All of these choices are true.
Q. 4An outlier is an observation that is unusually small or unusually large.
Indicate whether the statement is true or false
Q. 5A point estimator is defined as:
a. a range of values that estimates an unknown population parameter.
b. a single value that estimates an unknown population parameter.
c. a range of values that estimates an unknown sample statistic.
d. a single value that estimates an unknown sample statistic.
Q. 6We standardize residuals by subtracting their mean and dividing by their variance.
Indicate whether the statement is true or false
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