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2011 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 3,615,928,295 1.0466 3,454,928,621 41 28,118 .013326833
A 3,552,085,075 1.0057 3,531,952,943 48 16,394 .012606458
A 3,727,219,259 0.9843 3,786,669,978 45 10,583 .009699196
A 3,816,376,832 0.9972 3,827,092,692 24 5,012 .007132581
B 132,197,827 1.0431 126,735,526 8 33 .007561016
B 198,751,546 1.0703 185,697,044 9 23 .004034627
B 136,434,900 1.0685 127,688,255 5 9 .010250511
B 269,002,458 1.0543 255,147,926 4 13 .003095900
C 107,601,966 1.0079 106,758,573 34 5,243 .016176468
C 132,851,706 1.0367 128,148,651 46 1,931 .021464848
C 123,968,310 0.9696 127,855,105 22 419 .012141976
C 125,758,580 0.9901 127,016,039 10 69 .006840396
D3 269,585,378 0.9500 283,774,082 21 4,258 .009444898
F1 768,930,325 0.8286 927,987,358 15 1,280 .177464386
F1 772,644,962 0.9610 804,001,001 10 283 .002600624
F1 800,273,710 1.0345 773,585,027 11 94 .003685927
F1 667,931,790 1.0119 660,076,875 7 22 .002125821
L1 336,481,022 0.9808 343,067,926 10 2,592 .001309930
L1 338,378,824 1.0048 336,762,365 10 401 .001207241
L1 356,987,021 1.0138 352,127,659 9 108 .001588145
L1 388,642,870 0.9989 389,070,848 7 22 .000304435
Random Totals: 20,638,032,656   20,656,144,494 396 76,907  
Catg J Exception Values: 146,066,355   150,036,172      
Catg D1 Exception Values: 46,033,225   45,512,604      
Total Test Values (4): 20,830,132,236   20,851,693,270      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,042,584,664

Confidence Interval Values (5)

State Lower Limit: 19,809,108,606 (State Test Value minus Margin of Error Percent)
Local Test Value: 20,830,132,236 (Within Confidence Interval)
State Upper Limit: 21,894,277,934 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 21,140,758,651 (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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