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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:37:43                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      W
                                                        220-905/Fort Worth ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            2,758,184,743        0.9899         2,786,326,642              71           46,528         .007422414
      2           A            2,745,448,781        1.0095         2,719,612,463              78           25,894         .006236315
      3           A            2,748,480,587        1.0108         2,719,114,154              73           15,810         .007584779
      4           A            2,750,515,026        1.0063         2,733,295,266              77            6,339         .006334582
      5           B              369,970,227        1.1301           327,378,309               8            3,428         .013156982
      6           B              371,146,804        1.0145           365,842,094              19              256         .008433765
      7           B              370,235,533        1.0563           350,502,256               7               67         .007053548
      8           B              367,549,168        0.9240           397,780,485               7               25         .043507511
      9           C               78,259,331        0.5639           138,782,286              12            7,519         .363892322
     10           C               78,461,958        0.8226            95,382,881               7            1,464         .460680475
     11           C               78,085,690        0.8843            88,302,262              12              485         .100736018
     12           C               78,201,340        1.0462            74,747,983               7              145         .008173936
     13           F1           1,125,939,297        0.9300         1,210,687,416              22            3,877         .057650630
     14           F1           1,129,127,054        0.8676         1,301,437,361              17              805         .032098902
     15           F1           1,125,638,068        0.9080         1,239,689,502              15              209         .034693706
     16           F1           1,122,414,291        0.9894         1,134,439,348              17               44         .006004461
     17           L1             608,154,346        1.0946           555,595,054               7            3,611         .023909832
     18           L1             607,879,965        0.9699           626,744,989               9              539         .045867160
     19           L1             615,086,716        1.0647           577,708,947               7              152         .017769179
     20           L1             599,808,749        1.0863           552,157,552               7               31         .027827532
  RANDOM TOTALS:              19,728,587,674                      19,995,527,250             479          117,228
  CATG D1 EXCEPTION VALUES:        1,467,405                           1,430,520
 TOTAL TEST VALUES (4):       19,730,055,079                      19,996,957,770
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          999,847,889
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:         18,997,109,881 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:          19,730,055,079 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:         20,996,805,659 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):          19,337,798,123 (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