Discussion:
Error bar plot with bootstrap-based 95% confidence intervals on SPSS
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Ozne
2022-05-23 18:42:23 UTC
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Hi everyone,

I have 10 groups of non-normal data, and I would like to generate a plot with the mean of each group and associated the 95% confidence interval (CI) using bootstrapping.

I can generate the plot using "Chart Builder" -> "Simple Error Bar" but I believe that this assumes normal data (i.e. ), right? I see no option there to use bootstrapping to estimate the 95% CIs.

I can calculate the bootstrap-based 95% CI using Descriptive Analysis->Explore, but only in table-based form. Some plots can be generated too, but it looks like they are only box plots (and I need the means).

Would anyone be able to help putting the two things together? Thanks!
Rich Ulrich
2022-05-26 17:13:49 UTC
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Post by Ozne
Hi everyone,
I have 10 groups of non-normal data, and I would like to generate a plot with the mean of each group and associated the 95% confidence interval (CI) using bootstrapping.
I can generate the plot using "Chart Builder" -> "Simple Error Bar" but I believe that this assumes normal data (i.e. ), right? I see no option there to use bootstrapping to estimate the 95% CIs.
I can calculate the bootstrap-based 95% CI using Descriptive Analysis->Explore, but only in table-based form. Some plots can be generated too, but it looks like they are only box plots (and I need the means).
Would anyone be able to help putting the two things together? Thanks!
I posted in August, 2021, about asking on the SPSS list, which is
more active than this group - I wrote and quoted:

Here is the information that Bruce Weaver posted a few days ago
about subscribing to and using the SPSS list -- If "nabble" is not
working well, you might just want to use the .uga. URL at the end
of the message.

* * * Bruce's post
Hello everyone. On multiple occasions in the past, I have posted the
following advice in this forum:

The SPSS mailing list (http://spssx-discussion.1045642.n5.nabble.com/)
is a lot more active than this forum these days. You might want to
join that list (if not already a member) and post your question there.
Via the page given above, click on -more options- near the top for
info on how to subscribe. HTH.

That advice is no longer relevant for two reasons.

1. The address of the SPSSX Discussion forum on Nabble has been
changed to:

http://spssx-discussion.165.s1.nabble.com/

2. More importantly, the link between that discussion forum and the
SPSSX-L listserv mailing list administered by UGA has been severed.

I don't have any hard data, but I suspect that the actual mailing list
has more active members than the Nabble forum does. Here is the
website for the UGA listserv, in case anyone wishes to subscribe to
that list:

https://listserv.uga.edu

Cheers,
Bruce
* * *
--
Rich Ulrich
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