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axis","resamples":1000,"level":0.95,"block":"7 days","min_n":30,"ci_min_n":28,"ci_min_blocks":4,"ci_absent":"null when n < ci_min_n or fewer than ci_min_blocks blocks","proportions":"Wilson score intervals (hit rates), not bootstrapped","skill_denominator":"mae_persistence_common on n_common days","debiasing":"out-of-sample: bias of the trailing 30 scored days before each day, min 15","multiplicity":"pairwise carries distinguishable_uncorrected, p_boot and distinguishable_holm; only the Holm flag is marked on the site","ref":"https://castcheck.zifanzhang.com/methodology/"},"truth":{"source":"observed 2 m temperature at 00/06/12/18 UTC (routine METAR within +/-35 min) for t2* and for tmax_s/tmin_s; NWS Daily Climate Report (CLI), first final issuance after local midnight, for tmax_cli/tmin_cli","fallback":["CF6 monthly summary","hourly station observations (flagged)"],"policy":"first-final; later corrections are stored but never change a published score"},"license":"CC-BY-4.0 (CastCheck derived data); see /data/ for upstream 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