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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:41:02                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              043/Collin                                                VRSN:      W
                                                        043-902/Anna ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               48,323,333        0.9611            50,279,194              24              512         .013393677
      2           A               49,319,210        1.0050            49,073,841              89              332         .001324477
      3           A               47,207,351        0.9921            47,583,259              49              266         .004048843
      4           A               48,135,092        0.9964            48,309,004              32              187         .001772361
      5           C                5,815,700        0.8993             6,466,919               8              365         .010117102
      6           C                1,547,221        0.8843             1,749,656               6               82         .016403009
      7           C                3,675,604        0.9120             4,030,268               6              175         .012655100
      8           C                3,676,280        0.8261             4,450,163               7               90         .100074577
      9           D3              68,648,342        0.8599            79,832,936              21            1,694         .052584669
     10           F1               4,323,303        0.9598             4,504,379               5               21         .034103542
     11           F1               7,922,757        0.9621             8,234,858               3                4         .000747897
  RANDOM TOTALS:                 288,594,193                         304,514,477             250            3,728
  CATG D1 EXCEPTION VALUES:        3,822,150                           3,383,638
  CATG F1 EXCEPTION VALUES:        8,201,853                           8,017,101
 TOTAL TEST VALUES (4):          300,618,196                         315,915,216
 MARGIN OF ERROR PERCENT:          5.0000001
 MARGIN OF ERROR VALUE:           15,795,761
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            300,119,455 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             300,618,196 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            331,710,977 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             329,758,002 (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