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I have 2 samples, each containing 4 individual measurements, but I do not know what the individual measurements are, only what the group mean was for each sample. Is it possible to construct a confidence interval for the difference in means between the two groups or would I need to know the individual values (or at least the standard deviation among the samples) to do so?

Hybrid System
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  • Do you know anything besides the means? – Tim Dec 14 '15 at 13:06
  • I just know that the mean of the first sample is 11.8875 and the mean of the second sample is 11.275. Both contain 4 measurements each. My understanding is that I do not have enough information to calculate a confidence interval here but I was not sure if maybe there is some way to estimate it. – Hybrid System Dec 14 '15 at 13:29
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    Have a look here: http://stats.stackexchange.com/questions/157582/what-can-we-say-about-population-mean-from-a-sample-size-of-1/157596#157596 – soakley Dec 14 '15 at 18:32

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