taxes Property Tax Assistance

2017 Confidence Interval Detail

220/Tarrant
061-911/Northwest ISD

Category Summary

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

Stratum
Variance
A 757,894,150 0.9396 806,613,612 118 4,414 .006479709
A 992,085,556 0.9277 1,069,403,424 85 4,519 .008911048
A 871,873,983 0.9387 928,810,038 83 2,993 .008521557
A 1,125,130,596 0.9866 1,140,412,118 66 2,577 .024315243
F1 320,157,301 0.9275 345,183,074 9 177 .025650802
F1 296,364,302 0.9517 311,405,172 10 31 .008154561
F1 268,160,150 0.9833 272,714,482 6 17 .000570823
F1 509,079,080 0.9312 546,691,452 4 8 .013247804
L1 384,880,679 1.0266 374,908,123 12 57 .005218637
L1 386,928,901 1.0228 378,303,579 7 13 .001717797
L1 984,008,811 1.0061 978,042,750 3 7 .000017220
Random Totals: 6,896,563,509   7,152,487,824 403 14,813  
Catg D1 Exception Values: 1,517,318   940,018      
Catg L1 Exception Values: 582,024,127   582,024,127      
Total Test Values (4): 7,480,104,954   7,735,451,969      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 386,772,598

Confidence Interval Values (5)

State Lower Limit: 7,348,679,371 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,480,104,954 (Within Confidence Interval)
State Upper Limit: 8,122,224,567 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,715,803,550 (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