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2007 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 4,918,554,769 1.0084 4,877,583,071 99 29,451 .001403845
A 4,918,594,459 1.0010 4,913,680,778 100 21,203 .001566733
A 4,918,703,902 0.9993 4,922,149,407 100 15,005 .000863129
A 4,918,177,845 0.9939 4,948,362,858 100 7,492 .001135557
B 628,201,778 0.7829 802,403,599 6 197 .046487128
B 618,877,370 0.7786 794,859,196 6 40 .019676032
B 621,421,402 0.7166 867,180,299 6 29 .019052624
B 608,453,277 0.7832 776,881,099 5 19 .009556525
D3 260,635,544 0.8092 322,090,391 14 924 .167721181
F1 1,657,223,394 0.9614 1,723,760,551 5 856 .028456186
F1 1,660,735,147 0.9488 1,750,353,233 6 213 .001328240
F1 3,296,439,376 0.8991 3,666,376,795 10 98 .010077033
L1 519,731,283 0.9799 530,392,166 9 2,489 .003402105
L1 522,092,813 0.9939 525,297,125 11 276 .002967676
L1 527,688,890 0.9963 529,648,590 7 62 .001867646
L1 508,971,877 1.0063 505,785,429 6 16 .005235751
Random Totals: 31,104,503,126   32,456,804,587 490 78,370  
Catg D1 Exception Values: 1,739,941   1,705,268      
Total Test Values (4): 31,106,243,067   32,458,509,855      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,622,925,493

Confidence Interval Values (5)

State Lower Limit: 30,835,584,362 (State Test Value minus Margin of Error Percent)
Local Test Value: 31,106,243,067 (Within Confidence Interval)
State Upper Limit: 34,081,435,348 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 32,145,126,921 (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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