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2009 Confidence Interval Detail
187/Polk
187-910/Onalaska ISD

Category Summary

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

Stratum
Variance
A 55,324,021 0.7956 69,537,482 24 1,657 .136378645
A 55,494,476 0.7857 70,630,617 15 762 .063027419
A 66,355,547 0.6912 96,000,502 22 560 .074335799
A 97,382,766 0.7228 134,729,892 17 402 .066941064
C 9,158,581 0.8495 10,781,143 21 3,434 .094489411
C 9,768,440 0.7016 13,923,090 19 1,688 .260397230
C 9,355,646 0.7074 13,225,397 20 537 .407992878
C 8,916,415 0.9181 9,711,812 16 111 .021828083
F1 4,914,330 0.8631 5,693,813 12 75 .031812720
F1 4,190,880 0.9044 4,633,879 8 26 .018935364
F1 6,408,817 0.8771 7,306,826 9 19 .050496263
Random Totals: 327,269,919   436,174,453 183 9,271  
Catg D1 Exception Values: 3,834,027   3,759,057      
Catg F1 Exception Values: 4,913,344   5,961,860      
Total Test Values (4): 336,017,290   445,895,370      

Margin of Error

Margin of Error Percent: 5.4362527
Margin of Error Value: 24,239,999

Confidence Interval Values (5)

Local Test Value: 336,017,290 (Outside Confidence Interval)
State Lower Limit: 421,655,371 (State Test Value minus Margin of Error Percent)
State Upper Limit: 470,135,369 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 409,619,660 (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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