taxes Property Tax

School and Appraisal Districts Property Value Study 2012 Report

2012 Confidence Interval Detail
043/Collin
043-901/Allen ISD

Category Summary

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

Stratum
Variance
A 1,246,265,152 0.9734 1,280,321,709 10 8,348 .000693828
A 1,245,637,115 1.0030 1,241,911,381 10 6,259 .001296099
A 1,260,084,783 1.0066 1,251,822,753 10 4,582 .007614348
A 1,386,427,761 1.0256 1,351,821,140 10 3,089 .002346656
B 49,006,650 0.8599 56,991,104 4 6 .010017593
F1 287,218,445 0.9297 308,936,695 12 202 .005215530
F1 276,222,177 0.9607 287,521,783 9 64 .003541678
F1 303,716,324 0.9703 313,012,804 9 18 .005813714
L1 126,813,127 1.0242 123,816,761 10 580 .005884537
L1 130,915,479 1.0261 127,585,498 9 74 .001492721
L1 82,107,574 1.0230 80,261,558 6 12 .001946315
L1 237,507,366 1.0338 229,742,084 3 10 .001920716
Random Totals: 6,631,921,953   6,653,745,270 102 23,244  
Catg D1 Exception Values: 618,157   579,985      
Catg B Exception Values: 229,669,049   255,810,574      
Catg F1 Exception Values: 180,322,529   184,259,187      
Total Test Values (4): 7,042,531,688   7,094,395,016      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 354,719,751

Confidence Interval Values (5)

State Lower Limit: 6,739,675,265 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,042,531,688 (Within Confidence Interval)
State Upper Limit: 7,449,114,767 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,823,522,431 (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