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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:07:26                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              071/El Paso                                               VRSN:      W
                                                        071-909/Socorro ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              731,773,557        0.9395           778,896,814              57            9,378         .011207712
      2           A              731,695,148        0.9538           767,136,871              58            7,461         .003840198
      3           A              732,001,852        0.9664           757,452,248              57            5,921         .005457004
      4           A              731,453,821        0.9589           762,805,111              56            3,422         .009326309
      5           F1             137,348,716        1.0427           131,724,097               9              248         .003742333
      6           F1             135,725,139        0.7813           173,717,060               7               59         .018033538
      7           F1             137,892,895        0.8952           154,035,852               7               31         .005267941
      8           F1             134,137,826        0.9201           145,786,138               7               17         .019124085
      9           L1             515,059,190        1.0984           468,917,689              11            1,945         .075541639
  RANDOM TOTALS:               3,987,088,144                       4,140,471,880             269           28,482
  CATG D1 EXCEPTION VALUES:        3,013,984                           3,643,087
 TOTAL TEST VALUES (4):        3,990,102,128                       4,144,114,967
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          207,205,748
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          3,936,909,219 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           3,990,102,128 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          4,351,320,715 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           4,172,692,802 (SEE ISD SUMMARY WORKSHEET)

 SOURCES:
 (1) SEE STRATIFIED CATEGORY WORKSHEET REPORTS PTS236, PTS430
 (2) NUMBER OF PARCELS SAMPLED BY STAFF
 (3) TOTAL CATEGORY PARCELS FROM STRATIFICATION REPORT APPRAISAL ROLL, OR SELF-REPORT
 (4) INCLUDES ANY PARCELS IN A, B, C, D3, F1, G1, G2,OR L1 MARKED AS EXCEPTION PROPERTIES
 (5) UNSTUDIED CATEGORIES AND SUB-CATEGORIES WERE NOT INCLUDED IN THE CONFIDENCE INTERVAL VALUES