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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:43:51                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              057/Dallas                                                VRSN:      W
                                                        057-919/Sunnyvale ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               74,482,072        0.9928            75,022,232              12              370         .000505081
      2           A               74,579,599        1.0039            74,289,869              14              281         .002641066
      3           A               74,452,216        1.0060            74,008,167              10              229         .000767567
      4           A               74,406,019        1.0084            73,786,215              15              160         .003077673
      5           F1               7,500,503        0.8903             8,424,692               5               24         .010013079
      6           F1               8,116,871        0.9530             8,517,178               5               13         .012599148
      7           F1               7,926,536        0.9631             8,230,232               3                6         .003677621
      8           F1               6,728,868        0.8731             7,706,870               2                3         .000193980
      9           L1               6,590,734        1.0612             6,210,643               7               21         .005433184
     10           L1               8,071,498        0.9987             8,082,005               5                7         .000010476
  RANDOM TOTALS:                 342,854,916                         344,278,103              78            1,114
  CATG D1 EXCEPTION VALUES:          662,279                             718,795
  CATG F1 EXCEPTION VALUES:       18,678,440                          18,633,820
  CATG L1 EXCEPTION VALUES:       50,437,350                          49,909,171
 TOTAL TEST VALUES (4):          412,632,985                         413,539,889
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           20,676,994
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            392,862,895 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             412,632,985 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            434,216,883 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             450,661,149 (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