GNGTS 2021 - Atti del 39° Convegno Nazionale

301 GNGTS 2021 S essione 2.2 Tab. 3 reports the outputs of Kendall’s test. For each parameter, the table provides the calculated value of τ k , the associated p-value, and the assessment of statistical dependence at a significance level 0.05. The symbols in the last column of Tab. 3 indicate: (1) statistical dependence (Y) or independence (N); (2) the strength of statistical dependence (“s” for strong; “w” for weak) for Y-parameters; and (3) the type of correlation (“+” for positive correlation; “-“ for negative correlation). Parameter τ k p-value dependence k xL -0.063 5.26e-07 Ys- k vs -0.016 2.98e-01 N- k Ds -0.016 2.98e-01 N- k HL 0.124 2.74e-16 Ys+ k Hint 0.048 1.42e-03 Yw+ k Ibs1 0.096 1.06e-11 Ys+ k Ibs2 0.134 5.73e-22 Ys+ k Is2s1 -0.004 7.90e-01 Yw- k Hλ 0.311 5.84e-137 Ys+ k Lλ 0.295 1.14e-119 Ys+ Tab. 3 - Outputs of Kendall’s test and assessment of statistical dependence Fig. 2 - Relationship between fundamental aggravation period and peak spectral aggravation