# One-way ANOVA in R using summary data

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?

• ind.oneway.second(m, sd, n, unbiased = TRUE, contr = NULL, sig.level = 0.05, digits = 3) Why not specify n? Aug 29 '16 at 12:31
• So you have 3 observations? I.e. the means in each group, and their deviations? Or did I miss interpret? Aug 29 '16 at 12:40
• 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).
– Pini
Aug 29 '16 at 18:54

library(rpsychi)