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2006 Confidence Interval Detail
057/Dallas
057-916/Richardson ISD

Category Summary

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

Stratum
Variance
A 2,234,674,483 0.9996 2,235,568,710 44 17,313 .001832531
A 2,234,819,842 1.0069 2,219,505,256 96 12,669 .001453180
A 2,234,423,552 0.9957 2,244,073,066 72 9,529 .014060602
A 2,234,349,792 0.9995 2,235,467,526 71 6,007 .000681009
B 298,206,332 1.0232 291,444,812 15 644 .011460724
B 298,037,141 0.9659 308,559,003 6 55 .004976104
B 291,119,680 0.9645 301,834,816 8 27 .006502624
B 293,757,458 0.9573 306,860,397 7 11 .005703223
F1 998,557,249 0.9822 1,016,653,685 20 805 .002726141
F1 999,880,024 0.9936 1,006,320,475 10 242 .000419593
F1 1,008,670,860 0.9588 1,052,013,830 6 87 .005111999
F1 979,632,333 0.8234 1,189,740,506 6 18 .037790578
L1 324,890,765 0.9508 341,702,529 7 2,302 .280714904
L1 325,102,709 1.0545 308,300,340 8 344 .021120377
L1 329,195,655 1.0037 327,982,121 7 96 .016386370
L1 318,754,741 0.9626 331,139,353 7 20 .002091354
Random Totals: 15,404,072,616   15,717,166,425 390 50,169  
Catg D1 Exception Values: 9,544   10,967      
Total Test Values (4): 15,404,082,160   15,717,177,392      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 785,858,870

Confidence Interval Values (5)

State Lower Limit: 14,931,318,522 (State Test Value minus Margin of Error Percent)
Local Test Value: 15,404,082,160 (Within Confidence Interval)
State Upper Limit: 16,503,036,262 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 16,695,725,395 (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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