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I want to perform One-way ANOVA in R. I do not have the raw data, but only the mean, standard error and size of each group (there are three groups). If I understand correctly, the ind.oneway.second command in the rpsychi package is relevant only when the groups are the same size. Is there a way to perform One-way ANOVA in R when the groups are not the same size?

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  • $\begingroup$ ind.oneway.second(m, sd, n, unbiased = TRUE, contr = NULL, sig.level = 0.05, digits = 3) Why not specify n? $\endgroup$
    – Huub Hoofs
    Commented Aug 29, 2016 at 12:31
  • $\begingroup$ So you have 3 observations? I.e. the means in each group, and their deviations? Or did I miss interpret? $\endgroup$
    – Repmat
    Commented Aug 29, 2016 at 12:40
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    $\begingroup$ n can not get vector with different values. When I try to do it, I get the next error: Error in delta.upper + dfb : non-numeric argument to binary operator. Again, for each group I have only the following data: mean, standard error and size. I do not have the raw data (observations). $\endgroup$
    – Pini
    Commented Aug 29, 2016 at 18:54
  • $\begingroup$ @Pini, did you ever solve this error message? $\endgroup$
    – jrcalabrese
    Commented Jan 28, 2023 at 20:26

1 Answer 1

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Can use for group of different size.

library(rpsychi)
mu<-c(0.75,0.77,0.72,0.85)
mu.sd<-c(0.16,0.11,0.12,0.10)
mu.n<-c(13,22,42,28)
(mu.ind.anova <- ind.oneway.second(mu,mu.sd,mu.n))
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