taxes Property Tax Assistance

2016 Confidence Interval Detail

170/Montgomery
170-904/Willis ISD

Category Summary

(1) Category	(1) Local Value	(1) Stratum Ratio	(1) State Value	(2) Sample Size	(3) Total Parcels	Stratum Variance
A	529,468,700	0.9458	559,810,425	99	4,737	.009336216
A	635,953,290	0.9832	646,819,864	99	3,370	.011307322
A	646,294,740	0.9784	660,562,899	100	2,116	.008632311
A	653,175,170	0.9802	666,369,282	34	1,051	.008437217
F1	70,548,573	1.0101	69,843,157	10	270	.007729839
F1	77,430,800	1.0121	76,505,088	11	97	.027649680
F1	65,009,990	1.0096	64,391,828	8	32	.003197861
F1	72,550,799	1.0444	69,466,487	6	15	.003421300
L1	39,996,230	1.0501	38,088,020	10	223	.040723023
L1	38,645,254	1.0203	37,876,364	8	33	.021940160
L1	34,523,710	1.0244	33,701,396	4	9	.001971317
Random Totals:	2,863,597,256		2,923,434,810	389	11,953
Catg D1 Exception Values:	24,445,434		24,752,654
Catg L1 Exception Values:	29,496,515		30,492,126
Total Test Values (4):	2,917,539,205		2,978,679,590

Margin of Error

Margin of Error Percent:	5.0000000
Margin of Error Value:	148,933,979

Confidence Interval Values (5)

State Lower Limit:	2,829,745,611	(State Test Value minus Margin of Error Percent)
Local Test Value:	2,917,539,205	(Within Confidence Interval)
State Upper Limit:	3,127,613,569	(State Test Value plus Margin of Error Percent)
Value Assigned (6):	3,018,636,510	(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
(6) Includes local value of unstudied property categories and sub-categories