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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:18:22                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              118/Irion                                                 VRSN:      W
                                                        118-902/Irion County ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                6,553,464        0.7768             8,436,488               7              217         .021595299
      2           A                6,489,436        0.8946             7,254,008              11              116         .004323198
      3           A                6,580,264        0.8328             7,901,374               6               80         .039874794
      4           A                6,440,183        0.9026             7,135,146               9               49         .032827232
      5           D3               7,742,060        0.6634            11,670,274              10            2,308         .179195277
      6           G1              48,943,438        1.1490            42,596,552               7              284         .017083723
      7           G1              49,175,890        0.9695            50,722,940               7              111         .031911299
      8           G1              50,140,587        0.9895            50,672,650               6               43         .015221153
      9           G1              47,255,067        1.1461            41,231,190               3                4         .036800329
  RANDOM TOTALS:                 229,320,389                         227,620,622              66            3,212
  CATG J  EXCEPTION VALUES:        7,313,836                           7,217,416
  CATG D1 EXCEPTION VALUES:       14,183,370                          15,004,277
 TOTAL TEST VALUES (4):          250,817,595                         249,842,315
 MARGIN OF ERROR PERCENT:          5.0000001
 MARGIN OF ERROR VALUE:           12,492,116
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            237,350,199 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             250,817,595 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            262,334,431 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             296,110,640 (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