Statistics Help @ Talk Stats Forum - Statistics
http://www.talkstats.com/
Statistics course and homework discussion. Elementary statistics.enFri, 22 Sep 2017 12:37:48 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Statistics
http://www.talkstats.com/
How do I pose a hypothesis for a partial correlation?
http://www.talkstats.com/showthread.php/70183-How-do-I-pose-a-hypothesis-for-a-partial-correlation?goto=newpost
Fri, 22 Sep 2017 07:01:59 GMTHello everyone,
in my thesis I have following hypothesis:
3a: Internet skills are positively correlated with the frequency of experiencing risks...Hello everyone,
in my thesis I have following hypothesis:
3a: Internet skills are positively correlated with the frequency of experiencing risks online
3b: The positive correlation between internet skills and the frequency of experiencing risks online is at least partly caused by the amount of time spent on the internet on a daily basis.
For 3a, I calculated a Pearson correlation, and for 3b a partial correlation.
My supervisor told me that I'd have to calculate a mediation for 3b though, or rephrase the hypothesis. He did not have a suggestion though.
I don't really want to do a mediation, because I already have two mediations in my thesis and I don't think it fits the theoretic idea behind the hypothesis .. so I'd be thankful if someone has a suggestion for me how to phrase the hypothesis for a partial correlation! :)
]]>Statisticsdoeneryshttp://www.talkstats.com/showthread.php/70183-How-do-I-pose-a-hypothesis-for-a-partial-correlationShould you use a dependent t-test to measure difference across time?
http://www.talkstats.com/showthread.php/70182-Should-you-use-a-dependent-t-test-to-measure-difference-across-time?goto=newpost
Thu, 21 Sep 2017 19:57:28 GMTIs it proper to use dependent t-test to measure difference across time for scores IF the participants are different people? Although they are...Is it proper to use dependent t-test to measure difference across time for scores IF the participants are different people? Although they are different people, the demographic characteristics that's relevant to the scores being compared is very constant.
]]>Statisticsfeignfeignhttp://www.talkstats.com/showthread.php/70182-Should-you-use-a-dependent-t-test-to-measure-difference-across-timeComparing methods of standardising variables
http://www.talkstats.com/showthread.php/70179-Comparing-methods-of-standardising-variables?goto=newpost
Thu, 21 Sep 2017 11:14:51 GMTI have count data of the number scattered photons detected at various wavelengths. The data is collected under different conditions, so it is normal...I have count data of the number scattered photons detected at various wavelengths. The data is collected under different conditions, so it is normal practice to standardise the variables. There are 3 commonly used methods to do this:

1.) divide by the sum of squares
2.) zero mean and unit variance
3.) unit variance

Does anyone have any insight and/or resources comparing the strengths/ weaknesses of these (or other) methods?