Explain why the mean would be a misleading number for skewed distributions. Suggest a better measure of central tendency for such cases. The median or mode.
Empirical studies use sample observations to estimate an unknown population number of interest.
Come up with one drawback of using sample observations to make inferences about population parameters such as population mean or standard deviation. If the sample is not randomly selected or the sample is not representative of the population from which it is drawn, then the estimate may not be reliable. Moreover, for a given sample size, if the margin of error is very large, then then the estimate may not be useful, etc. The Irish are known to be cool-headed, calm people. Correlation does not imply causation.