A study about the effects of a new cancer fighting drug at increasing the lifespan

A study about the effects of a new cancer fighting drug at increasing the lifespan of lung cancer patients with stage-4 cancer was recently published. The study documented the effects of a random trial where 100 patients underwent normal, controlled lung cancer treatment using a new drug, and another 100 randomly selected patients underwent the same, controlled lung cancer treatment but received a placebo. The 95% confidence interval for the difference in average lifespan (drug-placebo) (.0001, 4.4319). What could be a valid conclusion about the effectiveness of the new drug? * None of these are correct. * Because 0 is almost in the interval, we need further testing before making a conclusion. * Because 0 is not in the Interval, the data provides sufficient evidence at the 95% confidence level that the new drug has an effect on the average lifespan of lung cancer patients. * Because 0 is not in the interval, the data does not provide sufficient evidence at the 95% confidence level that the new drug has an effect on the average lifespan of lung cancer patients. * We cannot draw conclusions based on a confidence interval.

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