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2007 Confidence Interval Detail
154/Madison
154-903/North Zulch ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 3,086,484 1.0230 3,017,091 10 104 .139578799
A 3,130,525 0.9811 3,190,832 7 61 .047104843
A 3,064,755 0.8391 3,652,431 11 37 .012355601
A 3,058,704 0.9214 3,319,627 8 23 .022701900
D3 27,843,210 0.9532 29,210,250 20 1,560 .058358114
G1 6,089,279 1.0082 6,039,753 6 32 .011715069
G1 6,492,604 1.0489 6,189,917 6 15 .003531550
G1 5,554,955 0.8421 6,596,550 2 6 .084504583
Random Totals: 58,320,516   61,216,451 70 1,838  
Catg J Exception Values: 5,947,011   5,936,822      
Catg D1 Exception Values: 2,979,067   2,854,048      
Catg G1 Exception Values: 12,956,238   12,827,012      
Total Test Values (4): 80,202,832   82,834,333      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 4,141,717

Confidence Interval Values (5)

State Lower Limit: 78,692,616 (State Test Value minus Margin of Error Percent)
Local Test Value: 80,202,832 (Within Confidence Interval)
State Upper Limit: 86,976,050 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 113,012,173 (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

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