DATE: 06/29/2006 COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION PAGE: 1 TIME: 11:19:23 2005 CONFIDENCE INTERVAL DETAIL REPT: PTS428 220/Tarrant VRSN: W 220-907/Keller ISD ____________________________________________________________________________________________________________________________________ (1) (1) (1) (1) (1) (2) (3) # STRATUM CATEGORY LOCAL VALUE STRATUM RATIO STATE VALUE SAMPLE SIZE TOTAL PARCELS STRATUM VARIANCE _________ ________ ___________ _____________ ___________ ___________ _____________ ________________ 1 A 1,450,996,996 0.9803 1,480,156,071 51 11,279 .002752082 2 A 1,442,520,440 1.0027 1,438,636,122 48 7,936 .003003765 3 A 1,445,056,780 0.9780 1,477,563,170 51 5,847 .003461230 4 A 1,445,445,208 0.9832 1,470,143,621 50 3,622 .004649877 5 F1 172,538,691 0.9236 186,811,056 7 220 .069694587 6 F1 173,045,766 0.9731 177,829,376 6 66 .006737652 7 F1 181,138,839 0.9403 192,639,412 7 23 .028648592 8 F1 160,975,368 0.8599 187,202,428 2 4 .002996663 RANDOM TOTALS: 6,471,718,088 6,610,981,256 222 28,997 CATG D1 EXCEPTION VALUES: 531,396 531,715 TOTAL TEST VALUES (4): 6,472,249,484 6,611,512,971 MARGIN OF ERROR PERCENT: 5.0000000 MARGIN OF ERROR VALUE: 330,575,649 CONFIDENCE INTERVAL VALUES (5): STATE LOWER LIMIT: 6,280,937,322 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT) LOCAL TEST VALUE: 6,472,249,484 (WITHIN CONFIDENCE INTERVAL) STATE UPPER LIMIT: 6,942,088,620 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT) VALUE ASSIGNED (6): 7,407,839,947 (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
