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2008 Confidence Interval Detail
170/Montgomery
170-902/Conroe ISD

Category Summary

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

Stratum
Variance
A 2,679,142,928 0.9529 2,811,567,770 12 22,770 .005990832
A 3,092,778,162 0.9732 3,177,947,145 13 16,690 .007184787
A 3,345,146,063 0.9660 3,462,884,123 14 11,256 .004585172
A 3,995,628,631 0.9647 4,141,835,421 12 6,377 .005594961
B 89,719,584 0.9730 92,209,233 6 26 .007038268
B 181,586,425 0.9630 188,563,266 6 25 .001577965
B 125,618,710 0.9581 131,112,316 4 10 .001714017
B 193,386,910 0.9513 203,286,986 3 11 .000061385
C 196,574,156 0.8555 229,776,921 7 8,617 .071763574
C 158,353,534 1.0007 158,242,764 7 2,121 .042707694
C 160,976,970 1.0116 159,131,050 7 441 .002273416
C 150,926,230 1.0189 148,126,637 6 70 .056566505
D3 236,511,192 0.8788 269,129,713 10 4,269 .157245246
F1 612,874,122 0.8959 684,087,646 13 1,145 .011436613
F1 654,941,083 0.8684 754,192,864 12 274 .024636333
F1 643,725,550 0.9691 664,250,903 6 87 .003618318
F1 676,351,760 0.9921 681,737,486 5 26 .004562927
L1 342,012,780 0.9454 361,765,158 8 2,620 .012160855
L1 345,090,519 0.9008 383,093,383 7 390 .009810298
L1 332,137,372 0.8877 374,154,976 7 93 .006441591
L1 301,722,048 0.9879 305,417,601 4 13 .019230962
Random Totals: 18,515,204,729   19,382,513,362 169 77,331  
Catg D1 Exception Values: 49,177,075   48,640,968      
Total Test Values (4): 18,564,381,804   19,431,154,330      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 971,557,717

Confidence Interval Values (5)

State Lower Limit: 18,459,596,613 (State Test Value minus Margin of Error Percent)
Local Test Value: 18,564,381,804 (Within Confidence Interval)
State Upper Limit: 20,402,712,047 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 18,349,340,969 (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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