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2009 Confidence Interval Detail
140/Lamb
140-907/Springlake-Earth ISD

Category Summary

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

Stratum
Variance
A 3,240,681 0.9554 3,391,963 15 208 .028040680
A 3,238,900 0.9379 3,453,353 16 98 .007469091
A 3,218,590 0.9508 3,385,139 13 58 .002357912
A 3,260,930 0.9595 3,398,572 11 32 .005269474
D3 6,342,611 0.9811 6,464,796 22 774 .004220516
Random Totals: 19,301,712   20,093,823 77 1,170  
Catg J Exception Values: 3,160,970   1,728,420      
Catg D1 Exception Values: 29,808,692   26,848,148      
Total Test Values (4): 52,271,374   48,670,391      

Margin of Error

Margin of Error Percent: 5.0000009
Margin of Error Value: 2,433,520

Confidence Interval Values (5)

State Lower Limit: 46,236,871 (State Test Value minus Margin of Error Percent)
State Upper Limit: 51,103,911 (State Test Value plus Margin of Error Percent)
Local Test Value: 52,271,374 (Outside Confidence Interval)
Value Assigned (6): 55,498,082 (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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