taxes Property Tax

School and Appraisal Districts Property Value Study 2012 Report

2012 Confidence Interval Detail
057/Dallas
057-919/Sunnyvale ISD

Category Summary

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

Stratum
Variance
A 114,934,500 1.0179 112,913,351 10 549 .005193026
A 115,630,690 1.0368 111,526,514 10 419 .005716103
A 116,013,580 1.0862 106,806,831 10 341 .006988110
A 118,768,390 1.0717 110,822,422 10 237 .007965377
C 10,105,970 0.7543 13,397,813 9 156 .075669936
C 10,550,020 0.9558 11,037,895 9 93 .005753732
C 12,042,530 0.6233 19,320,600 8 41 .196465604
C 8,643,580 1.0216 8,460,826 4 4 .006716043
F1 28,052,420 0.7829 35,831,422 8 43 .055677783
F1 17,924,480 0.9708 18,463,618 5 8 .020247559
L1 15,768,050 1.0305 15,301,359 8 27 .001822953
L1 40,852,120 1.0369 39,398,322 3 7 .018597385
Random Totals: 609,286,330   603,280,973 94 1,925  
Catg D1 Exception Values: 520,515   454,556      
Catg F1 Exception Values: 84,686,630   90,605,000      
Catg L1 Exception Values: 61,530,344   61,522,008      
Total Test Values (4): 756,023,819   755,862,537      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 37,793,127

Confidence Interval Values (5)

State Lower Limit: 718,069,410 (State Test Value minus Margin of Error Percent)
Local Test Value: 756,023,819 (Within Confidence Interval)
State Upper Limit: 793,655,664 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 806,061,179 (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