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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:19:17                                       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            2,758,335,314        0.9899         2,786,478,749              71           46,528         .007422414
      2           A            2,745,598,657        1.0095         2,719,760,928              78           25,894         .006236315
      3           A            2,748,630,628        1.0108         2,719,262,592              73           15,810         .007584779
      4           A            2,750,665,178        1.0063         2,733,444,478              77            6,339         .006334582
      5           B              384,322,709        1.1301           340,078,497               8            3,428         .013156982
      6           B              385,544,930        1.0145           380,034,431              19              256         .008433765
      7           B              384,598,307        1.0563           364,099,505               7               67         .007053548
      8           B              381,807,728        0.9240           413,211,827               7               25         .043507511
      9           C               78,997,217        0.5639           140,090,826              12            7,519         .363892322
     10           C               79,201,755        0.8226            96,282,221               7            1,464         .460680475
     11           C               78,821,939        0.8843            89,134,840              12              485         .100736018
     12           C               78,938,680        1.0462            75,452,762               7              145         .008173936
     13           F1           1,126,217,492        0.9300         1,210,986,551              22            3,877         .057650630
     14           F1           1,129,406,037        0.8676         1,301,758,918              17              805         .032098902
     15           F1           1,125,916,189        0.9080         1,239,995,803              15              209         .034693706
     16           F1           1,122,691,615        0.9894         1,134,719,643              17               44         .006004461
     17           L1             604,874,910        1.0946           552,599,041               7            3,611         .023909832
     18           L1             604,602,008        0.9699           623,365,304               9              539         .045867160
     19           L1             611,769,898        1.0647           574,593,686               7              152         .017769179
     20           L1             596,574,316        1.0863           549,180,075               7               31         .027827532
  RANDOM TOTALS:              19,777,515,507                      20,044,530,677             479          117,228
  CATG D1 EXCEPTION VALUES:        1,447,533                           1,409,487
 TOTAL TEST VALUES (4):       19,778,963,040                      20,045,940,164
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:        1,002,297,008
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:         19,043,643,156 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:          19,778,963,040 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:         21,048,237,172 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):          19,319,447,419 (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