taxes Property Tax Assistance

2018 Confidence Interval Detail

199/Rockwall
199-901/Rockwall ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 1,454,478,495 0.9393 1,548,470,664 198 7019 0.009641752
A 1,873,376,749 0.9822 1,907,327,173 199 6766 0.005512169
A 1,915,988,424 0.9890 1,937,298,710 200 5182 0.006630260
A 2,118,394,837 0.9724 2,178,522,045 200 3475 0.013828352
C1 47,853,423 0.8016 59,697,384 28 783 0.038305332
C1 53,044,005 0.9629 55,087,761 23 404 0.026842556
C1 64,989,932 0.9904 65,619,883 9 150 0.016521863
C1 71,013,035 0.9933 71,492,032 8 42 0.040992154
E 322,957,371 0.9140 353,345,045 22 931 0.032072353
F1 320,207,645 0.7854 407,700,083 10 368 0.123761107
F1 304,624,643 0.9673 314,922,612 9 122 0.035498876
F1 308,580,603 0.8936 345,322,967 8 49 0.012898145
F1 389,911,260 0.8676 449,413,624 6 17 0.017937372
L1 87,539,938 1.1223 78,000,479 12 627 0.024233029
L1 93,293,560 1.0046 92,866,375 11 131 0.002234499
L1 92,342,280 1.0913 84,616,769 8 27 0.008451383
L1 110,573,550 0.8773 126,038,470 4 7 0.084366993
Random Totals: 9,629,169,750 10,075,742,076 955 26,100
CATG D1 EXCEPTION VALUES: 1,867,130 1,486,892
Total Test Values(1) 9,631,036,880 10,077,228,968

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 503,861,448

Confidence Interval Values(5)

Local Test Value: 9,631,036,880 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 9,573,367,520 (State Test Value minus Margin of Error Percent)
State Upper Limit: 10,581,090,416 (State Test Value plus Margin of Error Percent)

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, D2, E, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values