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2009 Confidence Interval Detail
170/Montgomery
170-906/Magnolia ISD

Category Summary

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

Stratum
Variance
A 615,459,979 0.9955 618,242,068 34 5,279 .007772499
A 638,148,615 0.9751 654,444,278 25 3,110 .005459490
A 613,631,536 0.9753 629,172,087 29 1,930 .010279735
A 671,309,049 0.9860 680,840,820 17 1,324 .008613742
C 45,365,535 0.9389 48,317,749 10 3,053 .019817132
C 51,874,450 0.9730 53,313,926 7 1,400 .015038413
C 44,690,680 1.0982 40,694,482 9 603 .022937711
C 41,444,230 1.0220 40,552,084 9 255 .013568714
D3 279,234,329 0.9812 284,584,518 20 2,340 .008933564
F1 51,932,274 0.9721 53,422,769 7 250 .004199446
F1 56,549,950 0.9230 61,267,551 8 109 .012504460
F1 56,175,420 0.9795 57,351,118 6 42 .001366637
F1 55,374,380 0.9180 60,320,675 4 7 .019779008
Random Totals: 3,221,190,427   3,282,524,125 185 19,702  
Catg D1 Exception Values: 20,180,601   19,727,015      
Total Test Values (4): 3,241,371,028   3,302,251,140      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 165,112,557

Confidence Interval Values (5)

State Lower Limit: 3,137,138,583 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,241,371,028 (Within Confidence Interval)
State Upper Limit: 3,467,363,697 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,401,477,476 (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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