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2006 Confidence Interval Detail
199/Rockwall
199-902/Royse City ISD

Category Summary

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

Stratum
Variance
A 120,270,241 1.0071 119,422,342 48 1,092 .005806173
A 120,169,386 0.9926 121,065,269 39 736 .005320601
A 120,194,528 1.0531 114,134,012 40 580 .005467131
A 120,089,593 1.0535 113,991,071 40 398 .007097547
C 8,974,497 1.0020 8,956,584 7 484 .006710237
C 5,479,869 0.9991 5,484,805 8 225 .019342349
C 7,182,483 0.9750 7,366,649 7 179 .008016339
C 7,174,863 0.9456 7,587,630 8 101 .011125055
D3 116,877,145 0.9964 117,299,423 18 2,238 .008395506
Random Totals: 626,412,605   615,307,785 215 6,033  
Catg J Exception Values: 32,847,624   35,622,259      
Catg D1 Exception Values: 3,543,390   3,799,939      
Total Test Values (4): 662,803,619   654,729,983      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 32,736,499

Confidence Interval Values (5)

State Lower Limit: 621,993,484 (State Test Value minus Margin of Error Percent)
Local Test Value: 662,803,619 (Within Confidence Interval)
State Upper Limit: 687,466,482 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 756,179,730 (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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