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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:07:38                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              072/Erath                                                 VRSN:      W
                                                        072-908/Huckabay ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                1,259,887        0.9518             1,323,689               6               32         .007431479
      2           A                1,256,045        0.9534             1,317,438               7               18         .022885724
      3           A                1,156,712        0.9188             1,258,938               9               12         .005672961
      4           D3              42,616,220        0.9148            46,585,286              37            1,897         .075311672
      5           G1               1,422,430        0.9791             1,452,793               6               33         .008090328
      6           G1               1,377,090        1.1109             1,239,617               5               14         .014490687
      7           G1               1,432,010        1.0385             1,378,922               4                9         .004223667
      8           G1               1,243,010        1.0918             1,138,496               3                5         .051363583
  RANDOM TOTALS:                  51,763,404                          55,695,179              77            2,020
  CATG J  EXCEPTION VALUES:        4,939,907                           5,748,028
  CATG D1 EXCEPTION VALUES:        9,571,330                           8,360,783
  CATG A  EXCEPTION VALUES:        1,075,320                           1,195,999
 TOTAL TEST VALUES (4):           67,349,961                          70,999,989
 MARGIN OF ERROR PERCENT:          5.8612277
 MARGIN OF ERROR VALUE:            4,161,471
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             66,838,518 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              67,349,961 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             75,161,460 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              70,329,667 (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