2007 Confidence Interval Detail
246/Williamson
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 | 2,625,158,900 | 0.9743 | 2,694,405,111 | 26 | 17,852 | .006057478 |
| A | 2,625,116,334 | 1.0051 | 2,611,796,174 | 23 | 13,465 | .004777174 |
| A | 2,624,987,724 | 1.0118 | 2,594,374,110 | 26 | 9,813 | .003642298 |
| A | 2,624,973,877 | 0.9842 | 2,667,114,283 | 24 | 6,423 | .005144877 |
| B | 465,581,337 | 0.9859 | 472,239,920 | 25 | 2,185 | .004568599 |
| B | 466,791,212 | 1.0085 | 462,856,928 | 6 | 49 | .002595935 |
| B | 473,312,698 | 0.9393 | 503,899,391 | 5 | 20 | .003154450 |
| B | 455,739,699 | 0.9928 | 459,044,822 | 4 | 12 | .007390966 |
| C | 107,982,799 | 0.9655 | 111,841,325 | 8 | 1,549 | .005029838 |
| C | 108,049,187 | 0.9143 | 118,176,952 | 10 | 182 | .013161252 |
| C | 108,198,274 | 0.9079 | 119,174,220 | 9 | 70 | .043844183 |
| C | 106,429,364 | 1.0089 | 105,490,499 | 9 | 17 | .001433114 |
| F1 | 868,970,377 | 0.9636 | 901,795,742 | 11 | 710 | .021749157 |
| F1 | 869,890,382 | 0.8810 | 987,389,764 | 7 | 176 | .051767910 |
| F1 | 865,711,727 | 1.0403 | 832,175,072 | 6 | 63 | .001579550 |
| F1 | 860,733,242 | 0.9997 | 860,991,539 | 6 | 16 | .006328368 |
| L1 | 240,158,942 | 0.9868 | 243,371,445 | 8 | 1,268 | .034002487 |
| L1 | 240,078,044 | 0.9766 | 245,830,477 | 7 | 170 | .005809518 |
| L1 | 250,845,611 | 1.0011 | 250,569,984 | 6 | 41 | .004865088 |
| L1 | 228,215,562 | 0.9533 | 239,395,324 | 2 | 6 | .000879249 |
| Random Totals: | 17,216,925,292 | 17,481,933,082 | 228 | 54,087 | ||
| Catg D1 Exception Values: | 1,882,338 | 1,701,447 | ||||
| Total Test Values (4): | 17,218,807,630 | 17,483,634,529 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 874,181,726 |
Confidence Interval Values (5)
| State Lower Limit: | 16,609,452,803 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 17,218,807,630 | (Within Confidence Interval) |
| State Upper Limit: | 18,357,816,255 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 18,729,055,347 | (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