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2011 Confidence Interval Detail
110/Hockley
110-905/Ropes ISD

Category Summary

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

Stratum
Variance
A 4,262,040 1.0655 4,000,038 10 106 .013917697
A 4,302,040 0.9763 4,406,473 10 47 .002973020
A 4,133,320 0.9594 4,308,234 10 30 .003690541
A 4,869,970 0.9790 4,974,433 12 19 .000660275
D3 24,416,016 0.9863 24,755,162 16 1,073 .001668121
G1 4,726,360 0.9602 4,922,266 6 15 .107313069
Random Totals: 46,709,746   47,366,606 64 1,290  
Catg J Exception Values: 597,500   563,137      
Catg D1 Exception Values: 24,627,659   26,340,524      
Catg G1 Exception Values: 11,273,220   10,905,743      
Total Test Values (4): 83,208,125   85,176,010      

Margin of Error

Margin of Error Percent: 5.0000006
Margin of Error Value: 4,258,801

Confidence Interval Values (5)

State Lower Limit: 80,917,209 (State Test Value minus Margin of Error Percent)
Local Test Value: 83,208,125 (Within Confidence Interval)
State Upper Limit: 89,434,811 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 92,454,680 (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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