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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:24:22                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              156/Martin                                                VRSN:      W
                                                        156-905/Grady ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           D3               9,627,720        1.0456             9,207,842              29            1,326         .015702996
      2           G1              50,143,650        1.0138            49,461,087              15              166         .014770223
      3           G1              50,273,360        1.0139            49,584,140              34               49         .004669536
  RANDOM TOTALS:                 110,044,730                         108,253,069              78            1,541
  CATG J  EXCEPTION VALUES:        4,315,956                           4,634,515
  CATG D1 EXCEPTION VALUES:        8,664,630                          11,707,827
  CATG G1 EXCEPTION VALUES:       98,055,425                          96,153,822
 TOTAL TEST VALUES (4):          221,080,741                         220,749,233
 MARGIN OF ERROR PERCENT:          5.0000002
 MARGIN OF ERROR VALUE:           11,037,462
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            209,711,771 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             221,080,741 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            231,786,695 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             244,415,257 (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