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Results tagged with r
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user 143391
Use this tag for any *on-topic* question that (a) involves `R` either as a critical part of the question or expected answer, & (b) is not *just* about how to use `R`.
1
vote
Accepted
How to calculate average importance of factors (attributes) correctly in "conjoint" package ...
Can you improve your answer, please. There are several mistakes, such as in the first attribute calculation. Also, what is y,type = "score" supposed to be?
Usually you should be able to calculate impo …
- 311
1
vote
ANOVA sum of squares between groups
If all samples come from the same population, then the means of these samples can be seen as a sampling distribution. The variance of this sampling distribution is a function of the population varianc …
- 311
3
votes
Exact central confidence interval for a correlation
You first have to transform r to a z value (atanh part), then you add and subtract the standard error with the appropriate multiplier to get the correct confidence (as you did correctly). … Finally, you have to transform the whole thing back into the r-metric (tanh part).
se <- 1/sqrt(17)
r <- 0.7231654
tanh(atanh(r)+c(1,-1)*qnorm(.95)*se)
Which results in
[1] 0.8650790 0.4740748
As mentioned …
- 311
1
vote
Accepted
How to do a choice-based conjoint analysis with multiple regression and 3 levels per attribute?
Actually, if your data is tidy, you can just put in categorical variables into lm and R will handle the dummy-coding for you. …
- 311