5.10 Is it unbiased? A statistic has a sampling distribution that is somewhat skewed. The mean is 17, the median is 15, the quartiles are 13 and 19.

1. (a) If the population parameter is 15, is the estimator unbiased?

2. (b) If the population parameter is 17, is the estimator unbiased?

3. (c) If the population parameter is 16, is the estimator unbiased?

4. (d) Write a short summary of your results in parts (a), (b), and (c) and include a discussion of bias and unbiased estimators.