taxes Property Tax Assistance

2017 Confidence Interval Detail

084/Galveston
084-911/Friendswood ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 684,415,194 0.8923 767,023,640 32 3,256 .009124445
A 693,036,817 0.9856 703,162,355 25 2,123 .008164656
A 817,502,439 0.9783 835,635,734 21 1,901 .007376654
A 805,924,032 0.9715 829,566,682 14 1,139 .018863937
F1 37,955,966 1.0867 34,927,732 9 117 .005473809
F1 42,333,310 1.0444 40,533,617 8 55 .005341227
F1 41,575,750 1.0252 40,553,794 7 27 .002784784
F1 27,642,760 1.0671 25,904,564 4 7 .000348944
Random Totals: 3,150,386,268   3,277,308,118 120 8,625  
Catg D1 Exception Values: 68,330   47,525      
Total Test Values (4): 3,150,454,598   3,277,355,643      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 163,867,782

Confidence Interval Values (5)

State Lower Limit: 3,113,487,861 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,150,454,598 (Within Confidence Interval)
State Upper Limit: 3,441,223,425 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,953,254,889 (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, D2, E, 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