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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:16:09                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              110/Hockley                                               VRSN:      W
                                                        110-905/Ropes ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,561,883        0.7128             3,594,112              16              104         .051586142
      2           A                2,534,504        0.8197             3,091,990              16               44         .037690465
      3           A                2,491,709        0.9042             2,755,706              14               29         .045638549
      4           A                2,506,569        1.0063             2,490,876              12               20         .008413324
      5           D3              12,388,822        0.9900            12,513,962              28            1,058         .059488551
  RANDOM TOTALS:                  22,483,487                          24,446,646              86            1,255
  CATG J  EXCEPTION VALUES:        1,806,900                           1,872,410
  CATG D1 EXCEPTION VALUES:       13,364,101                           8,426,962
 TOTAL TEST VALUES (4):           37,654,488                          34,746,018
 MARGIN OF ERROR PERCENT:          5.0000003
 MARGIN OF ERROR VALUE:            1,737,301
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             33,008,717 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             36,483,319 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              37,654,488 (OUTSIDE CONFIDENCE INTERVAL)
 VALUE ASSIGNED (6):              45,123,643 (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