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2009 Confidence Interval Detail
079/Fort Bend
079-910/Stafford MSD

Category Summary

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

Stratum
Variance
A 128,722,523 0.9856 130,603,209 11 1,139 .004770996
A 120,983,990 0.9752 124,060,695 11 815 .004482805
A 98,856,140 0.9733 101,568,006 11 559 .003241440
A 93,341,210 0.9743 95,803,356 9 409 .003403879
B 169,249,440 1.0498 161,220,652 7 26 .027102867
F1 198,236,758 0.9697 204,431,018 10 264 .014562748
F1 171,884,152 1.0415 165,035,192 10 72 .018642247
F1 184,675,067 0.9435 195,734,040 8 33 .011037747
F1 179,962,138 0.9921 181,395,160 4 11 .017668844
L1 76,516,295 1.0709 71,450,458 7 680 .008613388
L1 86,670,460 1.0267 84,416,538 7 97 .004571924
L1 70,426,560 1.0766 65,415,716 6 23 .030971225
L1 79,397,800 1.0397 76,366,067 4 11 .003147216
Random Totals: 1,658,922,533   1,657,500,107 105 4,139  
Catg D1 Exception Values: 48,400   36,303      
Total Test Values (4): 1,658,970,933   1,657,536,410      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 82,876,821

Confidence Interval Values (5)

State Lower Limit: 1,574,659,589 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,658,970,933 (Within Confidence Interval)
State Upper Limit: 1,740,413,231 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,137,196,472 (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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