DATE: 06/29/2006 COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION PAGE: 1 TIME: 10:43:41 2005 CONFIDENCE INTERVAL DETAIL REPT: PTS428 057/Dallas VRSN: W 057-912/Irving ISD ____________________________________________________________________________________________________________________________________ (1) (1) (1) (1) (1) (2) (3) # STRATUM CATEGORY LOCAL VALUE STRATUM RATIO STATE VALUE SAMPLE SIZE TOTAL PARCELS STRATUM VARIANCE _________ ________ ___________ _____________ ___________ ___________ _____________ ________________ 1 A 893,965,079 0.9972 896,475,210 46 9,691 .003027504 2 A 893,928,599 0.9910 902,047,022 44 7,689 .004172261 3 A 893,757,983 0.9944 898,791,214 50 5,961 .002191480 4 A 893,881,252 1.0002 893,702,511 49 2,782 .001775805 5 B 207,377,315 1.0144 204,433,473 19 477 .000925293 6 B 208,164,077 0.9468 219,860,664 6 44 .047810396 7 B 205,971,485 0.9830 209,533,555 5 25 .000530484 8 B 204,420,004 0.8798 232,348,266 4 11 .022343897 9 F1 545,409,505 1.0136 538,091,461 21 812 .004263026 10 F1 541,328,101 0.9555 566,539,091 10 159 .009648961 11 F1 559,948,932 0.8365 669,395,017 9 45 .056449758 12 F1 521,051,730 0.9112 571,830,257 6 12 .011106122 13 L1 234,617,545 1.0245 229,006,877 7 1,167 .147205734 14 L1 235,023,667 1.0529 223,215,564 7 219 .013384970 15 L1 234,347,851 1.0097 232,096,515 7 82 .003758378 16 L1 233,579,068 1.0313 226,489,933 6 23 .005963237 RANDOM TOTALS: 7,506,772,193 7,713,856,630 296 29,199 CATG D1 EXCEPTION VALUES: 124,057 98,021 TOTAL TEST VALUES (4): 7,506,896,250 7,713,954,651 MARGIN OF ERROR PERCENT: 5.0000000 MARGIN OF ERROR VALUE: 385,697,733 CONFIDENCE INTERVAL VALUES (5): STATE LOWER LIMIT: 7,328,256,918 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT) LOCAL TEST VALUE: 7,506,896,250 (WITHIN CONFIDENCE INTERVAL) STATE UPPER LIMIT: 8,099,652,384 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT) VALUE ASSIGNED (6): 7,853,650,035 (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
