DATE: 01/23/2006 COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION PAGE: 1 TIME: 10:57:31 2005 CONFIDENCE INTERVAL DETAIL REPT: PTS428 020/Brazoria VRSN: W 020-901/Alvin ISD ____________________________________________________________________________________________________________________________________ (1) (1) (1) (1) (1) (2) (3) # STRATUM CATEGORY LOCAL VALUE STRATUM RATIO STATE VALUE SAMPLE SIZE TOTAL PARCELS STRATUM VARIANCE _________ ________ ___________ _____________ ___________ ___________ _____________ ________________ 1 A 439,242,164 0.9734 451,245,289 49 5,208 .000586590 2 A 438,793,464 0.9764 449,399,287 48 3,377 .001630632 3 A 438,910,741 0.9927 442,138,351 50 2,524 .001545442 4 A 438,979,921 1.0178 431,302,732 50 1,609 .002550446 5 C 53,482,909 0.9953 53,735,466 8 2,998 .001832147 6 C 53,470,077 0.9812 54,494,575 8 1,244 .005569419 7 C 53,351,781 0.9713 54,928,221 7 784 .011688775 8 C 53,419,939 1.0408 51,325,845 8 189 .009064639 9 D3 235,456,920 0.9911 237,571,305 10 6,491 .013899095 10 F1 54,788,871 0.8890 61,629,776 9 469 .030247182 11 F1 54,843,950 0.9292 59,022,762 7 159 .009687128 12 F1 55,013,308 0.9082 60,574,001 6 65 .015783189 13 F1 53,678,235 1.0064 53,336,879 5 18 .046017193 14 L1 38,552,959 1.0161 37,942,091 7 460 .003698806 15 L1 38,690,892 1.0221 37,854,312 7 96 .001810517 16 L1 39,548,553 0.9778 40,446,465 6 33 .001117920 17 L1 36,899,399 0.9422 39,163,022 4 9 .002635965 RANDOM TOTALS: 2,577,124,083 2,616,110,379 289 25,733 CATG D1 EXCEPTION VALUES: 12,478,520 12,422,763 TOTAL TEST VALUES (4): 2,589,602,603 2,628,533,142 MARGIN OF ERROR PERCENT: 5.0000000 MARGIN OF ERROR VALUE: 131,426,657 CONFIDENCE INTERVAL VALUES (5): STATE LOWER LIMIT: 2,497,106,485 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT) LOCAL TEST VALUE: 2,589,602,603 (WITHIN CONFIDENCE INTERVAL) STATE UPPER LIMIT: 2,759,959,799 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT) VALUE ASSIGNED (6): 2,616,137,517 (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
