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2008 Confidence Interval Detail
245/Willacy
245-902/Lyford CISD

Category Summary

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

Stratum
Variance
A 11,557,753 0.9520 12,140,497 18 630 .016635938
A 11,316,353 0.8969 12,617,185 15 349 .058861641
A 11,524,249 0.9739 11,833,093 15 238 .007788365
A 12,992,094 0.9920 13,096,869 15 136 .011094983
D3 17,175,490 0.9925 17,305,280 21 2,530 .022512143
G1 36,288,486 0.8165 44,443,951 15 39 .227082661
L1 472,232 0.9119 517,855 5 15 .005287172
L1 501,318 0.9825 510,247 4 6 .005772027
L1 404,478 0.8755 461,997 2 2 .021545091
Random Totals: 102,232,453   112,926,974 110 3,945  
Catg J Exception Values: 6,616,943   6,569,896      
Catg D1 Exception Values: 40,995,452   42,479,294      
Catg G1 Exception Values: 32,558,049   32,546,759      
Catg L1 Exception Values: 9,056,954   9,053,573      
Total Test Values (4): 191,459,851   203,576,496      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 10,178,825

Confidence Interval Values (5)

Local Test Value: 191,459,851 (Outside Confidence Interval)
State Lower Limit: 193,397,671 (State Test Value minus Margin of Error Percent)
State Upper Limit: 213,755,321 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 191,953,826 (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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