2009 Confidence Interval Detail
240/Webb
240-901/Laredo ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 292,819,850 | 0.9904 | 295,658,168 | 19 | 5,969 | .045470529 |
| A | 305,714,787 | 0.9511 | 321,432,854 | 17 | 4,184 | .020938939 |
| A | 309,031,367 | 0.9525 | 324,442,380 | 18 | 3,088 | .026228113 |
| A | 318,788,080 | 0.9756 | 326,761,050 | 8 | 1,934 | .006310735 |
| B | 41,459,970 | 0.9499 | 43,646,668 | 7 | 272 | .000512653 |
| B | 38,678,290 | 0.9518 | 40,636,993 | 7 | 163 | .004762404 |
| B | 41,627,017 | 0.9864 | 42,200,950 | 7 | 105 | .018051127 |
| B | 41,499,410 | 0.9825 | 42,238,585 | 6 | 44 | .005989933 |
| F1 | 159,187,761 | 1.0155 | 156,758,012 | 7 | 1,037 | .085900851 |
| F1 | 160,433,170 | 0.9056 | 177,156,769 | 7 | 372 | .004890010 |
| F1 | 166,717,280 | 0.9718 | 171,555,135 | 7 | 150 | .003949714 |
| F1 | 156,673,780 | 0.9003 | 174,023,970 | 4 | 10 | .000491767 |
| L1 | 47,669,510 | 0.9759 | 48,846,716 | 7 | 901 | .002282562 |
| L1 | 42,731,180 | 1.0216 | 41,827,702 | 7 | 187 | .002691631 |
| L1 | 44,385,220 | 0.9797 | 45,304,910 | 7 | 66 | .000832948 |
| L1 | 50,268,950 | 0.9621 | 52,249,194 | 5 | 15 | .000728868 |
| Random Totals: | 2,217,685,622 | 2,304,740,056 | 140 | 18,497 | ||
| Catg D1 Exception Values: | 1,620 | 2,480 | ||||
| Total Test Values (4): | 2,217,687,242 | 2,304,742,536 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 115,237,127 |
Confidence Interval Values (5)
| State Lower Limit: | 2,189,505,409 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 2,217,687,242 | (Within Confidence Interval) |
| State Upper Limit: | 2,419,979,663 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 2,163,951,268 | (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