A set of five observations is:
2, 4, 6, 8, 10.
(i) Compute the range, mean and variance of the original data.
(ii) A sixth observation, 50, is appended to the data set. Without using a calculator program, find the new range, mean and variance.
(iii) Comment, with figures obtained, on how the inclusion of the extreme value 50 affects each measure of dispersion.