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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:56:57                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              113/Houston                                               VRSN:      W
                                                        113-901/Crockett ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               28,695,378        0.9453            30,355,843              15              972         .010212799
      2           A               28,733,669        0.9870            29,112,127              27              606         .018722667
      3           A               28,695,144        0.9770            29,370,669              28              391         .006436945
      4           A               28,619,868        0.9696            29,517,191              27              192         .005536753
      5           D3              56,062,930        1.0035            55,867,394              27            3,567         .017205699
      6           F1              11,872,351        0.9330            12,724,921              12              174         .008792535
      7           F1              12,079,418        1.0072            11,993,068              10               52         .029095913
      8           F1              11,977,221        1.1201            10,692,993               7               14         .044139383
      9           F1              11,556,418        1.2438             9,291,219               4                5         .028811691
     10           L1               7,433,106        1.4384             5,167,621               8              177         .221679140
     11           L1               7,334,068        0.9546             7,682,870               7               45         .097151686
     12           L1               7,587,943        1.2536             6,052,922               5               17         .119011966
     13           L1               7,126,899        0.9881             7,212,730               3                4         .001815538
  RANDOM TOTALS:                 247,774,413                         245,041,568             180            6,216
  CATG J  EXCEPTION VALUES:       12,004,139                          12,140,772
  CATG D1 EXCEPTION VALUES:       17,340,940                          15,843,297
 TOTAL TEST VALUES (4):          277,119,492                         273,025,637
 MARGIN OF ERROR PERCENT:          5.0000001
 MARGIN OF ERROR VALUE:           13,651,282
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            259,374,355 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             277,119,492 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            286,676,919 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             270,906,663 (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