{
  "full_year_1963": {
    "n_scans_full_year": 51600,
    "n_scans_prefix_used": 1213,
    "comparison_prefix_vs_full": {
      "lccn": {
        "tvd_observed": 0.0483,
        "tvd_null_median": 0.0477,
        "tvd_null_p95": 0.0613,
        "p_value_one_sided": 0.476,
        "within_null_95": true
      },
      "month": {
        "tvd_observed": 0.0433,
        "tvd_null_median": 0.0372,
        "tvd_null_p95": 0.0535,
        "p_value_one_sided": 0.232,
        "within_null_95": true
      },
      "page_band": {
        "tvd_observed": 0.0199,
        "tvd_null_median": 0.0167,
        "tvd_null_p95": 0.0346,
        "p_value_one_sided": 0.348,
        "within_null_95": true
      }
    },
    "top_lccn_share_full": 0.6022286821705426,
    "top_lccn_share_prefix": 0.6059356966199505
  },
  "deep_stream_1900": {
    "n_scans_streamed": 32882,
    "n_scans_prefix_used": 626,
    "note": "population = all scans in the first 700 MB of a 5.7 GB shard; tests ordering homogeneity, not full-year representativeness",
    "comparison_prefix_vs_streamed": {
      "lccn": {
        "tvd_observed": 0.2904,
        "tvd_null_median": 0.3111,
        "tvd_null_p95": 0.3292,
        "p_value_one_sided": 0.986,
        "within_null_95": true
      },
      "month": {
        "tvd_observed": 0.0713,
        "tvd_null_median": 0.0511,
        "tvd_null_p95": 0.0727,
        "p_value_one_sided": 0.066,
        "within_null_95": true
      },
      "page_band": {
        "tvd_observed": 0.0231,
        "tvd_null_median": 0.0237,
        "tvd_null_p95": 0.0473,
        "p_value_one_sided": 0.532,
        "within_null_95": true
      }
    },
    "comparison_prefix_vs_later_only": {
      "lccn": 0.296,
      "month": 0.0727,
      "page_band": 0.0235
    }
  }
}