Re: Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Dr. Oliver Walter
I don't think that PSPP can produce bar charts with confidence intervals or something similar (bar charts for means aren't the best idea anyway).  I think it is only possible to split the data file to compare groups and then calculate confidence intervals for the mean for these groups. Comman

Re: Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Werner LEMBERG
> It seems to be a mixed ANCOVA with a within-subjects factor called > "Location", a between-subjects factor called "Group" and a covariate > "Age". I think that the GLM command in PSPP is not able to compute > such an analysis. GLM can only compute between-subjects designs in > PSPP (cf. PSPP m

Re: Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Dr. Oliver Walter
It seems to be a mixed ANCOVA with a within-subjects factor called "Location", a between-subjects factor called "Group" and a covariate "Age". I think that the GLM command in PSPP is not able to compute such an analysis. GLM can only compute between-subjects designs in PSPP (cf. PSPP manual, p.

Re: Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Werner LEMBERG
> I just responded to your statements about the relations between CIs > and hypothesis test that a CI is *not* always associated with a > hypothesis. The equations I mentioned were only examples for a > confidence interval and its equivalent hypothesis test. [...] Thanks a lot to all who have re

Re: Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Dr. Oliver Walter
I just responded to your statements about the relations between CIs and hypothesis test that a CI is *not* always associated with a hypothesis. The equations I mentioned were only examples for a confidence interval and its equivalent hypothesis test. BTW:  It's not safe to always use z instead

Re: Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Mark Hancock
This is a good point, yes. I'm not the original requester, but I think they were really asking for a simple way to get a CI when reporting summary/descriptive statistics (without having a second mean to compare to). In SPSS you can do this: https://en.wikibooks.org/wiki/Using_SPSS_and_PASW/Confiden

Confidence interval is mathematically equivalent to hypothesis test

2018-10-12 Thread Dr. Oliver Walter
A confidence interval is mathematically equivalent to its corresponding hypothesis test. The hypothesis test is significant if the corresponding confidence interval does not contain the parameter value of the null hypothesis. The confidence interval does not contain the parameter value of the n

Re: getting the confidence interval

2018-10-12 Thread Alan Mead
I think John is saying that in SPSS/PSPP you need to use a statistical function to generate statistical results like a CI. For example, T-TEST will produce a 95% CI for the mean difference in independent-samples t-tests. Other routines may provide other confidence intervals. But maybe you want to

Re: getting the confidence interval

2018-10-12 Thread Mark Hancock
I unfortunately don't know enough about PSPP syntax to suggest how to do this, but a CI is *not* always associated with a hypothesis and can be calculated from just a mean and SD (and a cumulative distribution function, which is typically the normal one). Typically the formula is something like: m

Re: getting the confidence interval

2018-10-12 Thread John Darrington
The confidence interval is a concept associated with a hypothesis. If it's the confidence interval on the test for a mean value, typically you would get that by using a T-Test. On Fri, Oct 12, 2018 at 10:40:22AM +0200, Werner LEMBERG wrote: Folks, I would like to get

getting the confidence interval

2018-10-12 Thread Werner LEMBERG
Folks, I would like to get a 95% confidence interval so that I could use it in AGGREGATE, e.g., AGGREGATE OUTFILE * MODE ADDVARIABLES /BREAK=... /Mean = mean(V) /CI = ci(V, 0.95) What must I do to get the result of my hypothetical `ci' function? I'm a PSPP novice, so maybe there