2009 Confidence Interval Detail
070/Ellis
070-905/Ferris ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 51,569,233 | 0.9511 | 54,220,621 | 9 | 1,062 | .024305741 |
| A | 51,808,417 | 0.9666 | 53,598,611 | 10 | 549 | .035211295 |
| A | 48,700,874 | 0.9864 | 49,372,338 | 7 | 356 | .005383064 |
| A | 49,166,680 | 0.9705 | 50,661,185 | 8 | 242 | .004745773 |
| D3 | 44,230,510 | 0.9602 | 46,063,851 | 11 | 1,503 | .037850228 |
| Random Totals: | 245,475,714 | 253,916,606 | 45 | 3,712 | ||
| Catg D1 Exception Values: | 5,864,417 | 5,650,232 | ||||
| Total Test Values (4): | 251,340,131 | 259,566,838 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 12,978,342 |
Confidence Interval Values (5)
| State Lower Limit: | 246,588,496 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 251,340,131 | (Within Confidence Interval) |
| State Upper Limit: | 272,545,180 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 304,892,563 | (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