Statistics Help @ Talk Stats Forum - Probability
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Probability course and homework discussion. Probability distributions. Probability theory, stochastic processesenFri, 01 Aug 2014 15:05:46 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Probability
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Probability Math Homework
http://www.talkstats.com/showthread.php/57038-Probability-Math-Homework?goto=newpost
Thu, 31 Jul 2014 19:03:52 GMTIf someone could please help. I got the first part of question correct, but cannot figure out how to calculate the second part of the question.
...If someone could please help. I got the first part of question correct, but cannot figure out how to calculate the second part of the question.

The second part, that I need help with, reads: Attachment 4683

Can someone please help me figure this out?

]]>Probabilityemily8319http://www.talkstats.com/showthread.php/57038-Probability-Math-HomeworkInterpretation histogram - normal versus logged variable
http://www.talkstats.com/showthread.php/57032-Interpretation-histogram-normal-versus-logged-variable?goto=newpost
Thu, 31 Jul 2014 16:25:46 GMTFor the histogram of my variable 'ambidexterity,' I predicted the data to have something like two normal distributions for this variable, one at the left side of the variable series, with lower values, and one at the right side, with higher values, and in between those two distributions low or no values at all.

If I look at the distribution of the values of 'ambidexterity,' the data is positively skewed. However, there is on the left side (compared to the one on the right) a huge distribution of ambidexterity values, and a very small one on the right.

Since the data is positively skewed, I also made a histogram of the logged values of 'ambidexterity.' Maybe not surprisingly at all, but the small distribution on the right is completely absorbed in the newly normal distribution of the logged values.

Enclosed you can find the two histograms.

My question is, how can I know whether there are two distributions for this variable, or just one? (E.g. Which histogram is appropriate in this scenario, or is there maybe a statistical test for it?)

Thanks a lot :)

]]>Probabilityrob1http://www.talkstats.com/showthread.php/57032-Interpretation-histogram-normal-versus-logged-variableStatistically different tops for 2 parabolas with non-normal distributed data
http://www.talkstats.com/showthread.php/57016-Statistically-different-tops-for-2-parabolas-with-non-normal-distributed-data?goto=newpost
Wed, 30 Jul 2014 22:32:09 GMTFor situation 1 and 2 from my data came two parabola relations between variables X and Y. (the two parabolas have both a maximum)
My question is...For situation 1 and 2 from my data came two parabola relations between variables X and Y. (the two parabolas have both a maximum)

My question is whether it is possible to test if the two maxima of the parabolas are significantly different from each other, since the tops of the parabolas are unequal to the means of the data. (for both parabolas, the vast majority of the observations is left from the maximum)

If it is possible, how can I measure this? (e.g., which test can do this?)

Thanks a lot :)
]]>Probabilityrob1http://www.talkstats.com/showthread.php/57016-Statistically-different-tops-for-2-parabolas-with-non-normal-distributed-data