2009 Confidence Interval Detail
091/Grayson
091-901/Bells ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 19,373,084 | 0.8263 | 23,445,582 | 15 | 366 | .037756516 |
| A | 18,211,285 | 0.9537 | 19,095,402 | 15 | 186 | .006424863 |
| A | 17,451,191 | 0.9906 | 17,616,789 | 16 | 126 | .002998716 |
| A | 18,550,331 | 0.9958 | 18,628,571 | 15 | 89 | .006853480 |
| D3 | 49,962,052 | 0.9865 | 50,645,770 | 20 | 1,664 | .028905592 |
| Random Totals: | 123,547,943 | 129,432,114 | 81 | 2,431 | ||
| Catg J Exception Values: | 5,240,920 | 5,221,773 | ||||
| Catg D1 Exception Values: | 3,199,355 | 2,206,888 | ||||
| Total Test Values (4): | 131,988,218 | 136,860,775 |
Margin of Error
| Margin of Error Percent: | 5.0000002 |
|---|---|
| Margin of Error Value: | 6,843,039 |
Confidence Interval Values (5)
| State Lower Limit: | 130,017,736 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 131,988,218 | (Within Confidence Interval) |
| State Upper Limit: | 143,703,814 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 153,055,147 | (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