The percent Fe content of a random sample consisting of five observations is shown:
If the mean grade of the stockpile is estimated using the above data, the standard error of the mean grade, in %, is _______ (rounded off to 3 decimal places).
For the following ten angle observations, the standard error of the mean angle is given as 2cm arcsecond (rounded off to 2 decimal places).
25$^\circ$40'12'' | 25$^\circ$40'14'' | 25$^\circ$40'16'' | 25$^\circ$40'18'' | 25$^\circ$40'09'' |
25$^\circ$40'15'' | 25$^\circ$40'10'' | 25$^\circ$40'13'' | 25$^\circ$40'15'' | 25$^\circ$40'18'' |
The residual error in a measurement comprises a bias of \( +0.08 \, {m} \) and a random component given by the following density function: \[ f(x) = \frac{1}{0.15 \sqrt{2\pi}} \exp\left( -\frac{x^2}{2 \cdot (0.15)^2} \right) \] For this system, the mean square error (MSE) is __________ m (rounded off to 2 decimal places).