Statistics: Basic Concepts - Chandra X-Ray Observatory (CXC)
Statistics: Basic Concepts - Chandra X-Ray Observatory (CXC)
Statistics: Basic Concepts - Chandra X-Ray Observatory (CXC)
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Figure 7: Com p arison of the d istribu tions of 500 sam p led valu es of χ 2 versu s the exp ected d istribu tion for 99<br />
d egrees of freed om . Top : χ 2 with Geh rels variance. Bottom : χ 2 with d ata variance.<br />
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Figu re 8: Top: Best- fit of a p ower- law tim es galactic absorp tion m od el to th e source sp ectru m of su p ernova<br />
rem n an t G21.5- 0.9. Bottom : Best- fit of a sep arate p ower- law tim es galactic absorp tion m od el to the<br />
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