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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:07:44                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              072/Erath                                                 VRSN:      W
                                                        072-910/Morgan Mill ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                1,161,521        0.9227             1,258,828               8               36         .024151653
      2           A                1,136,114        0.8920             1,273,670              13               21         .034200916
      3           A                1,177,359        0.9180             1,282,526              12               16         .024954052
      4           D3              28,555,610        0.9524            29,982,791              34              999         .019405255
      5           G1               1,711,860        1.0758             1,591,244               6               21         .018055597
      6           G1               1,683,970        1.1129             1,513,137               4               10         .002411409
      7           G1               1,785,450        1.1336             1,575,026               3                6         .007730269
      8           G1               1,287,890        1.0128             1,271,613               2                3         .008384726
  RANDOM TOTALS:                  38,499,774                          39,748,835              82            1,112
  CATG J  EXCEPTION VALUES:        1,398,040                           1,426,116
  CATG D1 EXCEPTION VALUES:        4,525,600                           3,896,411
  CATG A  EXCEPTION VALUES:          989,770                           1,096,798
 TOTAL TEST VALUES (4):           45,413,184                          46,168,160
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            2,308,408
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             43,859,752 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              45,413,184 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             48,476,568 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              43,171,483 (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