2010 Confidence Interval Detail
057/Dallas
057-912/Irving ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 1,080,112,410 | 0.9535 | 1,132,787,006 | 24 | 11,973 | .008606845 |
| A | 831,831,670 | 1.0009 | 831,083,695 | 25 | 7,069 | .002850340 |
| A | 939,956,530 | 1.0022 | 937,893,165 | 25 | 5,813 | .004588781 |
| A | 936,596,790 | 0.9836 | 952,213,085 | 25 | 2,349 | .010789781 |
| B | 278,295,330 | 1.0545 | 263,912,119 | 19 | 435 | .011584047 |
| B | 246,920,200 | 0.9160 | 269,563,537 | 8 | 42 | .055776793 |
| B | 194,008,350 | 0.9840 | 197,162,957 | 7 | 17 | .009925463 |
| B | 229,083,470 | 0.9435 | 242,801,770 | 4 | 8 | .021066592 |
| F1 | 673,785,880 | 0.9834 | 685,159,528 | 11 | 881 | .011986132 |
| F1 | 589,944,670 | 0.8099 | 728,416,681 | 10 | 164 | .063612567 |
| F1 | 686,060,600 | 0.8212 | 835,436,678 | 8 | 50 | .017671758 |
| F1 | 481,295,680 | 0.9100 | 528,896,352 | 6 | 10 | .003132128 |
| L1 | 272,416,170 | 1.1847 | 229,945,277 | 10 | 1,163 | .036235371 |
| L1 | 238,044,110 | 1.0969 | 217,015,325 | 10 | 180 | .005465857 |
| L1 | 276,626,010 | 1.0324 | 267,944,605 | 9 | 75 | .005947194 |
| L1 | 256,793,260 | 0.9839 | 260,995,284 | 6 | 16 | .028232168 |
| Random Totals: | 8,211,771,130 | 8,581,227,064 | 207 | 30,245 | ||
| Catg J Exception Values: | 176,649,876 | 164,528,356 | ||||
| Catg D1 Exception Values: | 102,264 | 58,984 | ||||
| Total Test Values (4): | 8,388,523,270 | 8,745,814,404 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 437,290,720 |
Confidence Interval Values (5)
| State Lower Limit: | 8,308,523,684 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 8,388,523,270 | (Within Confidence Interval) |
| State Upper Limit: | 9,183,105,124 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 8,695,317,015 | (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