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Table 3
Results from the correlation test performed on the mean and median XMM-RGS data.
| Data set | Spearman ρ test | Kendall τ test | ||
| ρtp-value | τ σ 2 | |||
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| Mean RGS data | ||||
| 2000–2005 | –0.01 –0.07 0.94 | 0.02 0.02 | ||
| 2005–2011 | –0.45 –1.33 0.22 | –0.28 0.07 | ||
| 2000–2011 | –0.36 –2.15 0.04 | –0.22 0.01 | ||
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| Median RGS data | ||||
| 2000–2005 | –0.05 –0.22 0.82 | 0.01 0.02 | ||
| 2005–2011 | –0.33 –0.94 0.37 | –0.22 0.07 | ||
| 2000–2011 | –0.35 –2.05 0.04 | –0.20 0.01 | ||
Notes. Column 3 shows the significance of a non-zero value of the Spearman rank, and Col. 5 shows whether the observed value of τ is significantly different from zero.
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