DATE: 06/29/2006 COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION PAGE: 1 TIME: 11:23:08 2005 CONFIDENCE INTERVAL DETAIL REPT: PTS428 240/Webb VRSN: W 240-901/Laredo ISD ____________________________________________________________________________________________________________________________________ (1) (1) (1) (1) (1) (2) (3) # STRATUM CATEGORY LOCAL VALUE STRATUM RATIO STATE VALUE SAMPLE SIZE TOTAL PARCELS STRATUM VARIANCE _________ ________ ___________ _____________ ___________ ___________ _____________ ________________ 1 A 237,189,005 0.9330 254,221,870 21 6,248 .047312754 2 A 237,137,401 0.8622 275,037,579 19 4,038 .023997372 3 A 237,262,619 0.9663 245,537,223 14 2,915 .033743348 4 A 236,988,629 1.0086 234,967,905 12 1,782 .011449503 5 B 28,042,699 0.9319 30,091,962 7 217 .021101180 6 B 27,897,190 0.9213 30,280,245 8 129 .005961635 7 B 28,148,241 0.9331 30,166,371 7 75 .003274253 8 B 27,450,315 0.9047 30,341,898 6 28 .002412057 9 F1 130,340,208 0.9705 134,302,121 8 958 .022564813 10 F1 130,062,788 1.0200 127,512,537 8 336 .011802351 11 F1 133,482,586 0.9296 143,591,422 8 125 .001893523 12 F1 126,693,198 0.9607 131,875,922 4 7 .002106515 13 L1 39,353,961 0.9817 40,087,563 7 872 .006338467 14 L1 39,248,946 0.9912 39,597,403 7 220 .021349931 15 L1 39,344,360 1.0214 38,520,031 6 62 .004139454 16 L1 39,169,560 0.9115 42,972,639 4 8 .002286728 RANDOM TOTALS: 1,737,811,706 1,829,104,691 146 18,020 CATG D1 EXCEPTION VALUES: 16,570 20,690 TOTAL TEST VALUES (4): 1,737,828,276 1,829,125,381 MARGIN OF ERROR PERCENT: 5.0000000 MARGIN OF ERROR VALUE: 91,456,269 CONFIDENCE INTERVAL VALUES (5): STATE LOWER LIMIT: 1,737,669,112 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT) LOCAL TEST VALUE: 1,737,828,276 (WITHIN CONFIDENCE INTERVAL) STATE UPPER LIMIT: 1,920,581,650 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT) VALUE ASSIGNED (6): 1,723,802,592 (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
