Concept explainers
In Exercises 7–10, use the same population of {4, 5, 9} that was used in Examples 2 and 5. As in Examples 2 and 5, assume that
7. Sampling Distribution of the Sample Variance
a. Find the value of the population variance σ2.
b. Table 6-2 describes the sampling distribution of the sample
c. Find the mean of the sampling distribution of the sample variance.
d. Based on the preceding results, is the sample variance an unbiased estimator of the population variance? Why or why not?
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Chapter 6 Solutions
ESSENTIALS OF STATISTICS 6TH ED W/MYSTA
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