Qualitatively there is no doubt that higher taxes have reduced smoking, but with that said, it's very difficult from a statistical standpoint to figure out what caused the real reduction.
Conclusions the reduction in death from all causes among patients with COPD in the combination-therapy group did not reach the predetermined level of statistical significance.
结论：联合治疗对COPD患者死亡率的降低并未达到预期的水平和统计学意义。
3
Experiments show that this system is particularly effective for statistical noise reduction within the complete television image bandwidth.