Bureau of Transportation Statistics (BTS)
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Table 4
An Illustration of Nij , uppercase T hatij and 90% Confidence Intervals

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Nij (observed flows) (pounds) uppercase T hatij (estimated flows) (pounds) Nijuppercase T hatij % difference 90% confidence interval of uppercase T hatij
Lower Upper
4,850,905.00 4,764,382.12 1.78 4,764,179.19 4,764,585.05
87,454.00 88,012.62 0.63 87,934.47 88,090.77
39,922,216.00 38,847,527.51 2.69 38,845,275.15 38,849,779.87
16,002,283,960.00 15,556,162,969.96 2.78 15,555,972,990.43 15,556,352,949.49
216,787,500.00 211,385,682.81 2.49 211,374,117.32 211,397,248.30
4,174,427.00 4,266,148.17 2.19 4,266,017.84 4,266,278.50
3,076,999.00 3,100,768.36 0.77 3,100,346.82 3,101,189.90
2,029,122,669.00 2,108,940,894.95 3.93 2,108,896,284.86 2,108,985,505.04
693,089.00 664,724.67 4.09 664,638.45 664,810.89