taxes Property Tax Assistance

2016 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	1,006,036,764	0.9349	1,076,090,239	90	6,205	.009654679
A	1,589,297,354	0.9719	1,635,247,818	97	6,895	.011111032
A	1,578,260,744	0.9537	1,654,881,770	94	4,992	.007669123
A	1,658,503,375	0.9870	1,680,347,898	100	2,966	.007996005
E	279,837,295	0.9307	300,674,003	12	988	.011255130
F1	281,210,322	0.9016	311,901,422	9	368	.020450793
F1	284,452,610	0.8169	348,209,830	9	121	.020526437
F1	297,617,288	0.9418	316,009,013	11	48	.009750034
F1	303,248,425	0.8563	354,138,065	6	14	.034127963
L1	77,874,190	1.0842	71,826,407	10	597	.081311169
L1	94,553,660	1.0446	90,516,619	9	142	.030924404
L1	89,861,647	1.0512	85,484,824	7	26	.001504066
L1	73,263,965	0.9562	76,619,917	3	4	.001879826
Random Totals:	7,614,017,639		8,001,947,825	457	23,366
Catg D1 Exception Values:	2,088,470		1,559,391
Total Test Values (4):	7,616,106,109		8,003,507,216

Margin of Error

Margin of Error Percent:	5.0000000
Margin of Error Value:	400,175,360

Confidence Interval Values (5)

State Lower Limit:	7,603,331,856	(State Test Value minus Margin of Error Percent)
Local Test Value:	7,616,106,109	(Within Confidence Interval)
State Upper Limit:	8,403,682,576	(State Test Value plus Margin of Error Percent)
Value Assigned (6):	7,656,199,577	(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