Psi 2 and C Statistic Minimization for Low Count per Bin Data
Abstract
Results are presented from a computer simulation comparing two statistical fitting techniques on data samples with large and small counts per bin; the results are then related specifically to X-ray astronomy. The Marquardt and Powell minimization techniques are compared by using both to minimize the chi-squared statistic. In addition, Cash's C statistic is applied, with Powell's method, and it is shown that the C statistic produces better fits in the low-count regime than chi-squared.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1989
- DOI:
- Bibcode:
- 1989ApJ...342.1207N
- Keywords:
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- Computerized Simulation;
- Data Flow Analysis;
- Data Sampling;
- Statistical Analysis;
- X Ray Astronomy;
- Mathematical Models;
- Optimization;
- Universe;
- Astronomy;
- NUMERICAL METHODS;
- X-RAYS: GENERAL