May 7th, 2009| 02:22 pm | Posted by hlee

Almost 100 years ago, A.S. Eddington stated in his book *Stellar Movements* (1914) that

…in calculating the mean error of a series of observations it is preferable to use the simple mean residual irrespective of sign rather than the mean square residual

Such eminent astronomer said already *least absolute deviation* over *chi-square*, if I match *simple mean residual* and *mean square residual* to relevant methodologies, in order. Continue reading ‘a century ago’ »

Tags:

chi-square minimization,

Eddington,

inference,

LAD,

Laplace,

mse,

PyMC,

Python,

R.A.Fisher,

utility function Category:

Astro,

Cross-Cultural,

Quotes,

Stat,

Uncertainty |

Comment
Apr 20th, 2009| 09:34 pm | Posted by hlee

I asked a couple of astronomers if they heard the term **plug-in estimator** and none of them gave me a positive answer. Continue reading ‘[MADS] plug-in estimator’ »

Tags:

biased,

breakdown point,

chi-square,

confidence interval,

coverage,

delta chi-square,

estimator,

LAD,

mean,

median,

plug-in,

rmse Category:

Bad AstroStat,

Cross-Cultural,

Data Processing,

Jargon,

Uncertainty |

2 Comments