taxes Property Tax Assistance

2017 Confidence Interval Detail

220/Tarrant
220-919/Carroll ISD

Category Summary

(1) Category	(1) Local Value	(1) Stratum Ratio	(1) State Value	(2) Sample Size	(3) Total Parcels	Stratum Variance
A	1,233,346,981	0.9482	1,300,724,511	120	2,633	.013299704
A	1,758,891,342	0.9749	1,804,176,164	147	2,837	.012591546
A	1,677,108,115	0.9850	1,702,647,832	122	2,088	.013463553
A	1,752,655,945	0.9709	1,805,186,883	65	1,320	.017559345
F1	308,890,800	0.9242	334,225,060	10	192	.009150988
F1	181,251,903	0.9514	190,510,724	9	33	.027493093
F1	310,805,230	0.8586	361,990,717	6	16	.035881229
F1	581,724,512	0.8392	693,189,361	4	9	.002732228
L1	72,125,928	1.1265	64,026,567	15	463	.019683391
L1	75,167,363	1.0310	72,907,239	11	101	.010081707
L1	93,317,128	1.0906	85,564,944	8	33	.013942385
L1	82,892,455	0.9668	85,738,989	3	8	.001609809
Random Totals:	8,128,177,702		8,500,888,991	520	9,733
Catg D1 Exception Values:	119,353		53,639
Total Test Values (4):	8,128,297,055		8,500,942,630

Margin of Error

Margin of Error Percent:	5.0000000
Margin of Error Value:	425,047,131

Confidence Interval Values (5)

State Lower Limit:	8,075,895,499	(State Test Value minus Margin of Error Percent)
Local Test Value:	8,128,297,055	(Within Confidence Interval)
State Upper Limit:	8,925,989,761	(State Test Value plus Margin of Error Percent)
Value Assigned (6):	7,785,796,578	(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, 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
(6) Includes local value of unstudied property categories and sub-categories