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2009 Confidence Interval Detail
170/Montgomery
170-908/New Caney ISD

Category Summary

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

Stratum
Variance
A 242,994,256 0.9163 265,190,719 16 4,212 .049016328
A 247,339,098 0.9926 249,183,053 23 2,157 .007489485
A 279,188,820 0.9505 293,728,375 43 1,761 .006144780
A 291,520,590 0.9641 302,375,884 17 1,099 .006136464
B 126,682,715 0.9830 128,873,566 7 29 .002344320
C 31,521,950 0.8841 35,654,281 7 3,711 .026580077
C 23,662,280 0.9704 24,384,048 7 978 .003310947
C 28,717,417 0.9632 29,814,594 7 522 .010767541
C 24,655,840 1.0133 24,332,221 5 24 .026648253
F1 86,009,647 0.9578 89,799,172 7 291 .055528920
F1 101,950,610 0.9674 105,386,200 6 62 .006848697
F1 84,920,440 0.9505 89,342,914 5 10 .008568907
L1 39,943,223 0.9157 43,620,425 8 351 .031061841
L1 41,110,839 0.9645 42,623,991 6 60 .004642559
L1 87,185,545 1.0863 80,259,178 7 14 .168658200
Random Totals: 1,737,403,270   1,804,568,621 171 15,281  
Catg D1 Exception Values: 17,025,154   16,957,043      
Catg F1 Exception Values: 78,961,300   80,899,969      
Catg L1 Exception Values: 66,033,317   77,631,589      
Total Test Values (4): 1,899,423,041   1,980,057,222      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 99,002,861

Confidence Interval Values (5)

State Lower Limit: 1,881,054,361 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,899,423,041 (Within Confidence Interval)
State Upper Limit: 2,079,060,083 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,936,088,611 (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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