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2009 Confidence Interval Detail
043/Collin
043-904/Farmersville ISD

Category Summary

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

Stratum
Variance
A 40,203,228 0.9663 41,605,328 8 693 .015475174
A 36,517,296 0.8932 40,883,672 8 392 .038535708
A 40,292,030 1.0124 39,798,528 11 303 .005975295
A 44,091,871 0.9687 45,516,539 8 207 .003698008
D3 97,571,456 0.9608 101,552,306 20 2,754 .016101958
F1 6,762,383 0.8359 8,089,943 7 55 .063540266
F1 6,428,126 0.9114 7,053,024 5 20 .034500157
Random Totals: 271,866,390   284,499,340 67 4,424  
Catg D1 Exception Values: 4,174,140   3,765,221      
Catg F1 Exception Values: 11,019,905   10,924,286      
Total Test Values (4): 287,060,435   299,188,847      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 14,959,442

Confidence Interval Values (5)

State Lower Limit: 284,229,405 (State Test Value minus Margin of Error Percent)
Local Test Value: 287,060,435 (Within Confidence Interval)
State Upper Limit: 314,148,289 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 333,914,517 (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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