2009 Confidence Interval Detail
187/Polk
187-901/Big Sandy ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 6,428,436 | 0.8762 | 7,336,722 | 8 | 264 | .035307016 |
| A | 7,242,034 | 0.9111 | 7,948,671 | 9 | 149 | .025501117 |
| A | 7,042,820 | 0.7542 | 9,338,133 | 9 | 92 | .056567375 |
| A | 10,130,823 | 0.9311 | 10,880,489 | 6 | 76 | .020057717 |
| D3 | 18,282,313 | 1.0540 | 17,345,648 | 19 | 1,282 | .204440288 |
| G1 | 41,623,450 | 0.9669 | 43,048,350 | 7 | 21 | .080433300 |
| G1 | 40,728,420 | 1.0643 | 38,267,800 | 6 | 11 | .001750060 |
| G1 | 44,850,610 | 0.9199 | 48,755,963 | 5 | 8 | .047873905 |
| G1 | 35,464,960 | 0.8394 | 42,250,369 | 2 | 3 | .005667402 |
| Random Totals: | 211,793,866 | 225,172,145 | 71 | 1,906 | ||
| Catg J Exception Values: | 2,308,770 | 2,433,430 | ||||
| Catg D1 Exception Values: | 20,476,124 | 20,820,169 | ||||
| Total Test Values (4): | 234,578,760 | 248,425,744 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 12,421,287 |
Confidence Interval Values (5)
| Local Test Value: | 234,578,760 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 236,004,457 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 260,847,031 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 295,412,697 | (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