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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:49:56                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              090/Gray                                                  VRSN:      W
                                                        090-902/Lefors ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                4,954,860        0.9382             5,281,241              11              334         .028331169
      2           D3               2,386,720        0.7277             3,279,813              15              335         .139135801
      3           G1              14,271,277        1.0814            13,197,038              15               89         .076913102
      4           G1              13,869,723        0.9549            14,524,791              12               22         .051676846
      5           G1              14,488,422        1.0087            14,363,460               6                8         .008819186
  RANDOM TOTALS:                  49,971,002                          50,646,343              59              788
  CATG J  EXCEPTION VALUES:        2,150,787                           1,949,320
  CATG D1 EXCEPTION VALUES:        2,154,340                           2,721,341
  CATG G1 EXCEPTION VALUES:       13,531,526                          14,760,740
 TOTAL TEST VALUES (4):           67,807,655                          70,077,744
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            3,503,887
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             66,573,857 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              67,807,655 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             73,581,631 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              77,748,347 (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