Consider the following outputs based on fitting a weighted arithmetic mean (WAM) and a weighted power mean with p = -2 (PM)

WAM

RMSE 0.1088
Average L1 error 0.0979
Pearson correlation 0.8871
Spearman correlation 0.8968
i w_i
1 0.2846
2 0.3692
3 0.1538
4 0.1924

PM

RMSE 0.0637
Average L1 error 0.0517
Pearson correlation 0.9483
Spearman correlation 0.9488
i w_i
1 0.2750
2 0.3375
3 0.1875
4 0.2

Define the data that was used for fitting?