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2009 Confidence Interval Detail
057/Dallas
057-913/Lancaster ISD

Category Summary

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

Stratum
Variance
A 311,114,300 1.0346 300,709,743 25 3,847 .017689215
A 226,033,300 1.0715 210,950,350 25 2,092 .016392231
A 195,046,190 1.0350 188,450,425 25 1,503 .006388774
A 169,774,130 1.0080 168,426,716 25 989 .022952669
B 22,220,320 1.2288 18,082,943 8 237 .032537896
B 19,853,530 0.6967 28,496,526 5 15 .015687063
B 34,775,220 0.8426 41,271,327 3 6 .005968601
F1 65,251,540 0.7778 83,892,440 8 166 .148720141
F1 51,794,150 0.9073 57,086,024 6 32 .036139622
F1 75,738,230 0.9605 78,852,920 4 13 .007125713
F1 48,047,100 0.9279 51,780,472 2 3 .000237607
L1 26,752,880 1.0523 25,423,244 7 190 .029352532
L1 23,267,320 0.9666 24,071,301 6 28 .095503563
L1 24,655,980 0.4401 56,023,586 4 8 1.033900708
L1 27,489,820 1.0376 26,493,658 2 4 .000930550
Random Totals: 1,321,814,010   1,360,011,675 155 9,133  
Catg J Exception Values: 98,446,658   115,488,076      
Catg D1 Exception Values: 1,420,095   1,835,372      
Total Test Values (4): 1,421,680,763   1,477,335,123      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 73,866,756

Confidence Interval Values (5)

State Lower Limit: 1,403,468,367 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,421,680,763 (Within Confidence Interval)
State Upper Limit: 1,551,201,879 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,522,280,577 (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

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