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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:43:57                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              057/Dallas                                                VRSN:      W
                                                        057-922/Coppell ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              713,228,226        0.9985           714,299,676              46            3,914         .000718931
      2           A              712,959,934        0.9912           719,289,683              49            2,743         .000845891
      3           A              713,187,909        0.9893           720,901,556              50            2,146         .001254185
      4           A              713,113,670        0.9837           724,930,029              49            1,446         .001214890
      5           F1             407,035,317        0.9602           423,906,808               7              141         .007621210
      6           F1             401,686,253        0.9203           436,473,164               6               56         .005414771
      7           F1             420,022,488        0.8777           478,549,035               6               32         .008814836
      8           F1             390,015,249        0.8333           468,037,020               5               17         .101018841
      9           L1             301,265,209        0.9016           334,145,085               7              248         .077440566
     10           L1             307,972,418        0.9957           309,302,418               7               57         .001005260
     11           L1             311,827,630        1.0327           301,953,743               7               20         .003056417
     12           L1             282,281,224        1.0236           275,772,982               5                7         .003765000
  RANDOM TOTALS:               5,674,595,527                       5,907,561,199             244           10,827
  CATG D1 EXCEPTION VALUES:          200,607                             185,878
 TOTAL TEST VALUES (4):        5,674,796,134                       5,907,747,077
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          295,387,354
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          5,612,359,723 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           5,674,796,134 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          6,203,134,431 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           6,095,168,081 (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