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Statistics course and homework discussion. Elementary statistics.enSun, 25 Sep 2016 07:05:23 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Statistics
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Question regarding conditional probability. Did I get this correct when explaining?
http://www.talkstats.com/showthread.php/66569-Question-regarding-conditional-probability.-Did-I-get-this-correct-when-explaining?goto=newpost
Sat, 24 Sep 2016 19:55:24 GMTHello,

I'm constantly getting my conversations marked off because I'm not writing exactly what the teacher wants. Here is the question that was asked in class and my answer to the question:

In your own words, describe what conditional probability is. Consider a business problem you are familiar with. Can you apply conditional probabilities to gain a better understanding of it? Try to provide an example.

My response:

Professor/Class:

In my own words, which I haven't been very successful at, I would say that conditional probabilities are where an outcome/event has already occurred.

In a business scenario (which I hope my words come across appropriately) lets say that there are two companies that invoices are processed for and out of those invoices we already know that 80% (A) of invoices are processed within an appropriate time limit. If you have 60% more invoices received from a different company are given, what is the conditional probability of both events?

The formula to be used would be P(A/B) (A + B)/P(A) = .80/.60 = .48

Since we already know that the event A was already occurred we then find out the amount within the B event to find the conditional probability.

Reference:

State Yale University. (1998). Conditional probability. Retrieved from http://www.stat.yale.edu/Courses/199...1/condprob.htm
]]>Statisticsdbrantley64http://www.talkstats.com/showthread.php/66569-Question-regarding-conditional-probability.-Did-I-get-this-correct-when-explainingGood source for post hoc test selection?
http://www.talkstats.com/showthread.php/66555-Good-source-for-post-hoc-test-selection?goto=newpost
Fri, 23 Sep 2016 16:21:51 GMTHi all - How do I select the most appropriate post hoc (post ANOVA) test? It's data from a normal distribution, 4 groups, experimental data from bending beams. My peers use Tukey HSD but I have also seen Fisher LSD, Sheffes and Bonferroni used. I have searched high and low for a logical train of thought to follow to select the right one but I can't find it, please help. :confused:
]]>Statisticsjarvishttp://www.talkstats.com/showthread.php/66555-Good-source-for-post-hoc-test-selectionSOS-Where to begin on this complex data set and what Stat Model to use?
http://www.talkstats.com/showthread.php/66545-SOS-Where-to-begin-on-this-complex-data-set-and-what-Stat-Model-to-use?goto=newpost
Thu, 22 Sep 2016 23:18:22 GMTHi Everyone,
This is my first time EVER posting anything on the web for help, so here it goes.
Recently I applied for a job and they sent me...Hi Everyone,

This is my first time EVER posting anything on the web for help, so here it goes.

Recently I applied for a job and they sent me over this complex data set as part of the interview process. Of course I failed miserably and tried everything I could with excel. I would like to know how to begin to approach these problems if anyone can help. I have attached the prompt and tried to attach the data sets (.csv files) but they were too large for this forum, so I instead attached a screenshot showing what I could.

I am under the notion that there should be some statistical model that is a plug-in for excel that will make predictions with standard deviation, but I do not know how or where to begin. Please help.