17.0. The table displays all possible samples of size 2 and the corresponding median for each sample.
17, 16
Sample 72 = 2
Sample Median
16.5
Using the medians in the table, is the sample median an unbiased estimator?
18, 18
18
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18, 17
17.5
4
18, 17
17.5
18, 16
17
18, 16
17
18, 15
16.5
Yes, 50% of the sample medians are 17 or more, and 50% are below.
O Yes, the mean of the sample medians is 16.8, which is the same as the mean age of the officers.
O No, the mean of the sample medians is 16.8, which is not the same as the median age of the officers.
O No, the median of the sample medians is 16.75, which is not the same as the median age of the officers.
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18, 15
16.5
17, 15
16
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16,
15