Elementary Statistics
12th Edition
ISBN: 9780321836960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 6.4, Problem 12BSC
In Exercises 11–14, use the population of ages {56, 49, 58, 46} of the four U.S. presidents (Lincoln, Garfield, McKinley, Kennedy) when they were assassinated in office. Assume that random samples of size n = 2 are selected with replacement.
12. Sampling Distribution of the
11. Sampling Distribution of the Sample
- a. After identifying the 16 different possible samples, find the mean of each sample, then construct a table representing the sampling distribution of the sample mean. In the table, combine values of the sample mean that are the same. (Hint: See Table 6-4 in Example 1.)
- b. Compare the mean of the population {56, 49, 58, 46} to the mean of the sampling distribution of the sample mean.
- c. Do the sample means target the value of the population mean? In general, do sample means make good estimators of population means? Why or why not?
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Chapter 6 Solutions
Elementary Statistics
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