The research shows that influence of sample variation coefficient on estimated accuracy should be considered.

研究表明，应考虑样本变差系数对估计精度的影响。

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But he explained that a spacecraft's orbit lifetime could only be estimated to about 10% accuracy.

BBC: Nasa refines satellite crash time

Raytheon is the prime contractor for the PAC-2 Patriot system--much improved since its dismal accuracy in the Gulf war of 1991--and supplies an estimated 50% to 65% of the newer PAC-3 system.

FORBES: Ready, Aim, Fire