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2009 Confidence Interval Detail
237/Waller
237-902/Hempstead ISD

Category Summary

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

Stratum
Variance
A 30,698,240 0.9116 33,675,121 11 796 .009784830
A 32,606,860 0.9367 34,810,356 11 414 .033968551
A 37,360,970 0.9814 38,069,054 11 307 .010216206
A 38,902,200 1.0127 38,414,338 12 184 .007306414
D3 156,564,750 0.9107 171,916,932 28 86,523 .108066935
F1 13,416,730 1.1193 11,986,715 7 139 .006988819
F1 14,290,030 0.9250 15,448,681 6 50 .014649617
F1 17,418,260 1.0278 16,947,130 7 22 .007107090
F1 10,544,930 0.9950 10,597,920 3 3 .005114873
L1 6,424,435 1.0697 6,005,829 7 157 .054122299
L1 6,051,219 1.1301 5,354,587 7 34 .009191254
L1 4,310,642 1.1452 3,764,095 4 7 .093633213
L1 9,018,143 1.0026 8,994,757 3 6 .004188943
Random Totals: 377,607,409   395,985,515 117 88,642  
Catg D1 Exception Values: 11,780,420   11,546,736      
Total Test Values (4): 389,387,829   407,532,251      

Margin of Error

Margin of Error Percent: 5.3697740
Margin of Error Value: 21,883,561

Confidence Interval Values (5)

State Lower Limit: 385,648,690 (State Test Value minus Margin of Error Percent)
Local Test Value: 389,387,829 (Within Confidence Interval)
State Upper Limit: 429,415,812 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 408,250,952 (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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