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2010 Confidence Interval Detail
057/Dallas
057-913/Lancaster ISD

Category Summary

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

Stratum
Variance
A 266,155,070 0.9705 274,245,307 25 3,804 .012304743
A 232,178,230 1.0289 225,656,750 25 2,381 .012573794
A 211,413,700 1.0399 203,301,952 25 1,774 .008931330
A 188,473,100 1.0039 187,740,910 24 1,169 .032486044
F1 59,945,110 0.9530 62,901,480 9 161 .024812175
F1 60,284,550 0.9551 63,118,574 8 39 .034700616
F1 56,838,090 0.9422 60,324,867 5 9 .012311460
F1 80,932,780 1.0081 80,282,492 3 6 .001850992
L1 24,344,380 1.0732 22,683,917 16 168 .025154025
L1 22,553,180 0.9898 22,785,593 15 27 .121535624
L1 23,785,720 0.9260 25,686,523 7 8 .024682651
Random Totals: 1,226,903,910   1,228,728,365 162 9,546  
Catg J Exception Values: 83,155,050   90,926,522      
Catg D1 Exception Values: 1,329,258   1,695,402      
Catg L1 Exception Values: 45,774,980   46,329,484      
Total Test Values (4): 1,357,163,198   1,367,679,773      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 68,383,989

Confidence Interval Values (5)

State Lower Limit: 1,299,295,784 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,357,163,198 (Within Confidence Interval)
State Upper Limit: 1,436,063,762 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,498,085,292 (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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