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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:10:43                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              091/Grayson                                               VRSN:      W
                                                        091-908/Van Alstyne ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               51,996,607        1.0102            51,471,597              17              700         .012191479
      2           A               51,895,223        1.0279            50,486,646              15              418         .008479534
      3           A               51,827,964        1.0744            48,238,984              18              304         .006754221
      4           A               51,899,965        1.0236            50,703,366              19              196         .004084851
      5           D3              52,291,245        1.0247            51,030,785              23            1,905         .008016079
  RANDOM TOTALS:                 259,911,004                         251,931,378              92            3,523
  CATG D1 EXCEPTION VALUES:        4,945,006                           3,368,988
 TOTAL TEST VALUES (4):          264,856,010                         255,300,366
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           12,765,018
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            242,535,348 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             264,856,010 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            268,065,384 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             299,814,783 (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