econ

consider the following sample measurements: 5, 11, -1, 8, 2, 7, 5, 1, -10, -6, 4, 12

1. find the mean, the median, the range and the standard deviation of this sample. interpret your result.

2. find the 20th percentile of these measurements, interpret your result

3. is this distribution skewed to the right or to the left? provide evidence

4. are there any outliers in this set of data ? provide evidence.