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2010 Confidence Interval Detail
043/Collin
043-910/Plano ISD

Category Summary

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

Stratum
Variance
A 5,126,623,777 0.9900 5,178,407,856 99 30,846 .003169082
A 5,065,700,718 0.9874 5,130,343,040 100 21,454 .002214500
A 4,894,087,463 0.9922 4,932,561,442 100 14,854 .003097930
A 4,800,628,978 0.9890 4,854,023,234 100 7,517 .003910285
B 712,852,693 0.8963 795,328,231 13 188 .027384803
B 641,353,658 1.0246 625,955,161 9 42 .031203674
B 672,262,737 1.0126 663,897,627 11 32 .018106196
B 381,710,038 1.0069 379,094,287 8 12 .003641480
F1 1,677,570,364 0.9755 1,719,703,090 15 923 .006467005
F1 1,522,870,473 1.0222 1,489,796,980 10 192 .020498613
F1 1,540,497,244 1.0771 1,430,226,761 10 75 .010536761
F1 1,702,883,314 1.0172 1,674,088,983 7 26 .003079102
L1 578,854,051 0.8628 670,901,774 10 2,232 .027697699
L1 678,816,124 0.9899 685,742,119 10 257 .014110015
L1 438,252,668 1.0042 436,419,705 8 39 .001336955
L1 909,591,440 0.9329 975,014,943 6 22 .013562844
Random Totals: 31,344,555,740   31,641,505,233 516 78,711  
Catg J Exception Values: 319,747,050   318,587,582      
Catg D1 Exception Values: 1,031,165   1,088,332      
Total Test Values (4): 31,665,333,955   31,961,181,147      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,598,059,057

Confidence Interval Values (5)

State Lower Limit: 30,363,122,090 (State Test Value minus Margin of Error Percent)
Local Test Value: 31,665,333,955 (Within Confidence Interval)
State Upper Limit: 33,559,240,204 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 32,920,118,828 (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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