2009 Confidence Interval Detail
227/Travis
246-909/Round Rock ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 3,527,344,349 | 1.0071 | 3,502,476,764 | 70 | 12,036 | .004711370 |
| B | 512,717,862 | 1.0164 | 504,444,965 | 20 | 310 | .003829862 |
| F1 | 976,977,365 | 1.0646 | 917,694,312 | 20 | 335 | .013174895 |
| L1 | 496,991,721 | 0.9355 | 531,257,852 | 10 | 1,117 | .012883341 |
| Random Totals: | 5,514,031,297 | 5,455,873,893 | 120 | 13,798 | ||
| Catg D1 Exception Values: | 247,693 | 169,023 | ||||
| Total Test Values (4): | 5,514,278,990 | 5,456,042,916 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 272,802,146 |
Confidence Interval Values (5)
| State Lower Limit: | 5,183,240,770 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 5,514,278,990 | (Within Confidence Interval) |
| State Upper Limit: | 5,728,845,062 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 5,565,817,947 | (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