Mercury is a persistent and dispersive environmental contaminant found in many ecosystems around the world. When released as an industrial by-product, it often finds its way into aquatic systems whe can have deleterious effects on various avian and aquatic species. The accompanying data on blood mercury concentration (ug/g) for adult females near contaminated rivers in a state was read from a g in an article. 0.20 0.23 0.26 0.30 0.35 0.41 0.54 | 0.57 1.43 1.70 1.84 2.20 2.24| 3.06 3.26 n USE SALT (a) Determine the values of the sample mean and sample median. Hint: x, = 18.59. (Round your answers to four decimal places.) Explain why they are different. O They aren't different since the data is symmetric. O The sample mean and sample median are never equal. O There is heavy positive skewness in the data. O There is heavy negative skewness in the data. O There are an odd number of data values. (b) Determine the value of the 10% trimmed mean. (Round your answer to four decimal places.) Compare to the mean and median. O It is below both the mean and median. O It is the same as the median. O It is the same as the mean. O It is between the values of the mean and median.