DATE: 06/29/2006 COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION PAGE: 1 TIME: 10:57:00 2005 CONFIDENCE INTERVAL DETAIL REPT: PTS428 113/Houston VRSN: W 113-902/Grapeland ISD ____________________________________________________________________________________________________________________________________ (1) (1) (1) (1) (1) (2) (3) # STRATUM CATEGORY LOCAL VALUE STRATUM RATIO STATE VALUE SAMPLE SIZE TOTAL PARCELS STRATUM VARIANCE _________ ________ ___________ _____________ ___________ ___________ _____________ ________________ 1 A 13,036,152 0.9708 13,428,257 9 401 .005569192 2 A 13,031,924 1.0258 12,704,157 8 227 .010261000 3 A 12,983,656 0.9412 13,794,790 7 159 .013087257 4 A 12,976,417 0.8804 14,739,229 7 93 .027725231 5 D3 50,758,960 0.9877 51,391,070 34 4,051 .040913591 6 G1 29,992,370 1.1098 27,025,023 8 41 .001583785 RANDOM TOTALS: 132,779,479 133,082,526 73 4,972 CATG J EXCEPTION VALUES: 7,332,796 7,609,202 CATG D1 EXCEPTION VALUES: 17,680,720 16,238,937 TOTAL TEST VALUES (4): 157,792,995 156,930,665 MARGIN OF ERROR PERCENT: 5.0000000 MARGIN OF ERROR VALUE: 7,846,533 CONFIDENCE INTERVAL VALUES (5): STATE LOWER LIMIT: 149,084,132 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT) LOCAL TEST VALUE: 157,792,995 (WITHIN CONFIDENCE INTERVAL) STATE UPPER LIMIT: 164,777,198 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT) VALUE ASSIGNED (6): 192,732,122 (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
