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It hit the news in a last few days, you have probably heard about it. That's what I have found about the trial:
And it makes me wonder - what is statistical significance of this diference? What is a confidence level that those that were given vaccine were in fact more immune? Or in other words - what is a confidence level that probability of contracting AIDS was lower in those that received vaccine? (Sure, we have to assume both group were otherwise identical).
In theory I should know how to calculate it, but after 20 years of lying somewhere in the dark corner my statistics is so rusty I prefer not to touch it, as it may fall apart
New infections occurred in 51 of the 8,197 given vaccine and in 74 of the 8,198 who received dummy shots. That worked out to a 31 percent lower risk of infection for the vaccine group.
And it makes me wonder - what is statistical significance of this diference? What is a confidence level that those that were given vaccine were in fact more immune? Or in other words - what is a confidence level that probability of contracting AIDS was lower in those that received vaccine? (Sure, we have to assume both group were otherwise identical).
In theory I should know how to calculate it, but after 20 years of lying somewhere in the dark corner my statistics is so rusty I prefer not to touch it, as it may fall apart