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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:10:28                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              091/Grayson                                               VRSN:      W
                                                        091-901/Bells ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               14,155,013        0.9886            14,318,241              18              362         .070918046
      2           A               14,142,563        1.0315            13,710,677              16              192         .010137851
      3           A               14,112,978        0.9751            14,473,365              12              132         .010386183
      4           A               14,084,158        0.9759            14,431,968              15               86         .022188989
      5           D3              37,085,035        1.0907            34,001,132              21            1,666         .037162135
  RANDOM TOTALS:                  93,579,747                          90,935,383              82            2,438
  CATG J  EXCEPTION VALUES:        4,903,216                           5,209,970
  CATG D1 EXCEPTION VALUES:        3,604,521                           2,450,236
 TOTAL TEST VALUES (4):          102,087,484                          98,595,589
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            4,929,779
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             93,665,810 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             102,087,484 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            103,525,368 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             100,030,719 (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