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2008 Confidence Interval Detail
072/Erath
072-902/Dublin ISD

Category Summary

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

Stratum
Variance
A 17,865,200 0.8611 20,746,952 16 536 .134072061
A 18,268,220 0.9726 18,782,871 16 314 .020772516
A 18,034,150 0.9285 19,422,886 15 211 .018736073
A 18,654,510 0.9535 19,564,248 16 137 .004058501
D3 122,148,250 0.9566 127,689,996 23 3,273 .028371106
F1 4,878,670 1.0169 4,797,591 10 91 .012427539
F1 4,751,400 0.9898 4,800,364 9 33 .001483847
F1 5,354,180 0.9677 5,532,892 7 16 .005732557
F1 5,113,180 0.9967 5,130,109 4 7 .000379666
L1 2,940,850 0.9380 3,135,235 6 83 .015271268
L1 3,339,300 0.9852 3,389,464 5 22 .002387872
L1 3,521,590 0.9894 3,559,319 5 9 .001108030
L1 1,841,920 0.9965 1,848,389 2 2 .000082619
Random Totals: 226,711,420   238,400,316 134 4,734  
Catg J Exception Values: 5,289,650   5,346,480      
Catg D1 Exception Values: 17,274,470   12,003,322      
Total Test Values (4): 249,275,540   255,750,118      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 12,787,506

Confidence Interval Values (5)

State Lower Limit: 242,962,612 (State Test Value minus Margin of Error Percent)
Local Test Value: 249,275,540 (Within Confidence Interval)
State Upper Limit: 268,537,624 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 245,396,811 (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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