116 posts tagged with statistics and resolved.
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Math Problem

Please help with this probability related math problem. [more inside]
posted by BeaverTerror on Dec 4, 2014 - 9 answers

Math, sweet sweet math

I have a set of data: D(t). 5000 samples. Scatter-graphing makes some patterns clear (D-mean increases with t, for instance). D and t are always positive. I want to characterize these, statistically. [more inside]
posted by IAmBroom on Oct 16, 2014 - 11 answers

is this a good use case for a gamma distribution?

I want to generate synthetic user-session data to predict how big a peak in application usage might be shortly before a weekly deadline (for timesheet submission - it's a time and labour tracking application). I've come up with a method that looks like it works - it involves a gamma distribution for the login time. But I don't have enough (in fact, any) statistical training to know whether I'm using that distribution meaningfully. Statisticians, please reassure me. Thanks! Excel functions inside... [more inside]
posted by rd45 on Sep 10, 2014 - 3 answers

Gun Violence Statistics - Workplace Edition

I need help finding some statistics regarding workplace violence and - particularly separating out violence perpetrated by internal employees vs external 3rd parties. [more inside]
posted by Suffocating Kitty on Aug 1, 2014 - 9 answers

What are inter-disciplinary and atypical uses for math MSc?

I have just completed my MSc in mathematics in Europe. I do enjoy math, but I spent my uni years feeling like a autodidact hippie marooned on an island full of Mr and Mrs I-Want-A-Good-Job. My main interests revolve around humanities (literature/history/anthropology) and economics (but not finance), and instead of starting a "stable" well-paying career I dream about something inter-disciplinary. I am very open to earning little money and relocating just to do kind of work that engages those skills. What are some random uses of my degree? [more inside]
posted by desultory_banyan on Jul 28, 2014 - 12 answers

The Mid-PhD Crisis

Hi Hivemind, I'm currently enrolled in a PhD program for statistics and operations research, and in two more years I can grab that PhD. Alternatively, I can jump ship now with a MS, headed for the (inviting/inevitable) waters of industry. Knowing that I have no interest in staying in academia, give me some motivation to finish. Or, tell me to quit because actual work experience is more valuable! What roles should I be looking at other than Data Scientist? Would it be feasible to get a position doing private research, and would that be awesome? Bonus points if you can tell me what skills I should be cultivating to be hire-able (software engineering)? P.S. I will also do some more chatting with profs and former students to figure out how I should be directing myself, but I hope the HiveMind can provide some complementary ideas.
posted by zscore on Feb 16, 2014 - 12 answers

Economics 101: How to read national accounts

I'm trying to reconcile two numbers from the same national statistical agency. I'm looking for a dummy's guide for what defines the difference between the two numbers and how to use one to estimate the other. [more inside]
posted by MuffinMan on Oct 22, 2013 - 6 answers

Where can I find a word-count tool to track my writing goals?

I'm looking for a word-count tool that will allow me to: set a goal for words written by a specific date, enter in the words I have written each day, see how many words I remaining toward my goal, and how many words I will need to average each day to reach my goal. [more inside]
posted by Tevin on Aug 26, 2013 - 7 answers

I'm having trouble understanding likelihood ratios and diagnostic tests.

I'm struggling to understand likelihood ratios (LR) in the context of diagnostic tests, and why a positive LR is influenced by the sensitivity of the test. [more inside]
posted by cacofonie on Aug 1, 2013 - 6 answers

Statistical analysis of votes for a certain outcome

We have a group of six people with 55 different options. Each member of the party has to vote for each option under 8 different analyses i.e. appearance, distinctness, etc. The options are quality weighted. [more inside]
posted by trashcan on Jul 10, 2013 - 4 answers

OkCupid Blog RIP...

So I take it that the OkTrends blog was killed off after Match bought OkCupid. Where can I now get my regular fix of really interesting statistics presented at a level that the lay person can understand? (I already know about Nate Silver and xkcd's What If.)
posted by capricorn on Jul 7, 2013 - 7 answers

The limits to bedbugs

What are the limits to bedbugs? Why isn't every hotel room infested given how tough they are claimed to be? Is there any evidence on the chances of taking bed bugs home from a hotel with you? Will the bedbug infestation rates go ever upwards? Why or why not? Interested in aggregated, rather than anecdotal evidence here. [more inside]
posted by mister_kaupungister on May 31, 2013 - 5 answers

R Statistical Computing for Semi-Dummies?

StatFilter: Would anybody be able to recommend a good introduction to the statistical computing language "R" that a reasonably quantitatively-adept psychologist might be able to work through on his own? Something like a step-by-step book or textbook with exercises would be great to help me become more fluent in R. (My colleagues at work who use R are primarily computer scientists who either first learned MatLab or are brilliant autodidacts when it comes to learning different scripting languages, and thus don't have any suggestions; Googling has mostly proferred a somewhat obscurely structured guide from the R authors and lots of invocations to just learn on my own, somehow...). I've become familiar with how to do many individually useful tasks in data structuring and analysis, but I feel a bit like a very high-functioning tourist who has learned a lot of phrases to get around but who would be lost and mugged in an alleyway if I strayed off the beaten path.
posted by Keter on Feb 7, 2013 - 16 answers

Educate me on these crime statistics

The Wikipedia page on statistics about rape shows a very high crime rate for countries like UK, US and Australia in stark contrast to, say, India. The gap can't be explained simply by under-reporting, as that exists in all these countries (even assuming different rates of under-reporting). Is it because these countries have different definitions of rape? Or something else? [more inside]
posted by vidur on Jan 13, 2013 - 32 answers

Biostatistics filter

What statistical test should I use to determine if there is a significant difference in the percent change in the presence of bacterial species observed among five groups before and after treatment. [more inside]
posted by waving on Dec 18, 2012 - 19 answers

What does a professional statistician do?

(Good) jobs involving probability and statistics other than math teacher or actuary? [more inside]
posted by CustooFintel on Dec 3, 2012 - 15 answers

How do I negotiate with my publisher?

My stats notes are getting too long to distribute using the university printers. A publisher wants to turn them into a printed book, but I want to keep control of the electronic distribution of my work. How should I approach this situation? [more inside]
posted by mixing on Nov 26, 2012 - 17 answers

Biostatistics training outside of school

What after bio-statistics software experience is most attractive to future employers? [more inside]
posted by waving on Sep 6, 2012 - 5 answers

Help me keep my SmartyPants image shiny.

Considering the huge amount of oil/energy expended driving trucks full of food all over the country, would it make more sense to increase our train infrastructure (is that even possible?) to move more food? That's the question, but not why I've come to Metafilter. [more inside]
posted by kestralwing on Aug 14, 2012 - 10 answers

Does Facebook publish photo upload statistics?

Does Facebook publish statistics? I'm specifically interested in statistics about photo uploads and camera metadata / popularity. [more inside]
posted by ztdavis on Aug 2, 2012 - 1 answer

So, um, how big is your....kneecap?

Say I'm an industrial designer (I'm not), and I have to design a car seat, desk chair, climbing harness, body armor, or some other piece of equipment that has to be able to interact with a whole bunch of differently-shaped humans on a regular basis. What resource do I use to find out things like average foot width, or average knee circumference, average jaw length, or any other specific anatomical measurements? [more inside]
posted by cirgue on Jul 11, 2012 - 6 answers

Important or interesting research done in your field?

What is some recent important or interesting research done in your field? [more inside]
posted by benthegirl on Jun 2, 2012 - 17 answers

How to model the accident rate on a certain stretch of road

How could I approach modeling the number of accidents on a certain stretch of road? I've got some semi-ecological approaches in mind but no idea if they're workable. Are there standard approaches to this sort of problem? [more inside]
posted by col_pogo on May 7, 2012 - 9 answers

Looking for cancer survival statistics by individual hospitals in England.

Looking for cancer survival statistics by individual hospitals in England. [more inside]
posted by paduasoy on May 2, 2012 - 9 answers

Help the stats-challenged understand an odds ratio

Statistics make my head go wobbly. But I need to understand something about odds ratios. Actually, I don't need to understand -- I just need to make sure I'm not screwing up this particular figure. Please help! [more inside]
posted by neroli on Apr 19, 2012 - 15 answers

Bathrooms and Statistics

My workplace has 3 small bathrooms. It seems to me that if I go to use one of them, and it's occupied, there is a statically higher chance the 2nd and even 3rd bathroom will be occupied (vs the chance that they would be occupied if the 1st one was not). Is it true? [more inside]
posted by lohmannn on Apr 13, 2012 - 30 answers

Lies, damned lies and statistics?

I'm trying to find the primary source of a much-repeated, but somewhat dubious, statistic. [more inside]
posted by Skeptic on Apr 11, 2012 - 17 answers

How to determine relationship between two dimensions of a 3 x 3 frequency matrix?

Could someone help me to analyze statistical relationship between two dimensions of a frequency matrix - preferably in Excel? [more inside]
posted by Susurration on Apr 10, 2012 - 10 answers

Skip patterns and user-missing values in SPSS

SPSS-filter: changing systems-missing values to user-missing values to match survey skip pattern. [more inside]
posted by palindromic on Mar 14, 2012 - 2 answers

Who are the 1% in India?

Where can I find the income distribution for India? My google-fu is weak on this one. [more inside]
posted by vidur on Mar 6, 2012 - 6 answers

Counting the Elderly

"Fewer persons alive at 70 today survive until 90 than forty years ago." True or False? [more inside]
posted by jrb223 on Mar 1, 2012 - 13 answers

That's not a blue moon; pull over...

Can anyone point me to actual data on how often motorists receive traffic tickets? I'm looking for where the top of the bell curve is, so to speak - obviously, individuals vary widely, which is kind of the point of my question - how often does the "median" driver receive traffic tickets? [more inside]
posted by randomkeystrike on Mar 1, 2012 - 12 answers

Recommendations for free or cheap graphing software

Can you recommend free (or cheap) graphing software for Windows? [more inside]
posted by inbetweener on Feb 22, 2012 - 11 answers

Is joint parameter estimation always strictly better than individual parameter estimation?

Is it true that it is always better to estimate parameters jointly, even when they are completely unrelated? [more inside]
posted by TheyCallItPeace on Feb 20, 2012 - 3 answers

How can I integrate a time sequence of correlations?

Statistics filter: If I asses the same paired variables for the same population at multiple points in time, can I integrate the relation into an overall correlation? [more inside]
posted by lord_yo on Feb 1, 2012 - 3 answers

Ref.Cat? s.e.? Stats help needed!

Would you be kind to someone who is culturally proficient, but statistically deficient? Specifically, what is going on in the tables at the end of this paper? [more inside]
posted by robself on Jan 26, 2012 - 6 answers

A little help on a statistics paper on inflation, in German.

I am looking for a little translation help on an inflation statistics paper in German language (look in more inside for the link). This official paper is quite interesting for students of statistics and social students interested in perceived cost of living vs actual cost of living, in Europe as well as in any other country, as it allegedly shows that indeed there were some excessive rouding of prices during the conversion to euro in Germany. [more inside]
posted by elpapacito on Jan 2, 2012 - 5 answers

More arrivals or departures?

Are there more arriving or departing flights in the United States? Bonus: previous years, other countries, domestic vs. international, etc.
posted by michaelh on Dec 12, 2011 - 16 answers

Statistics terminology

What does "posthoc" mean? [more inside]
posted by cnanderson on Nov 30, 2011 - 7 answers

Use statistics to find cheaters

What would be a good statistical approach to find manipulated test results? [more inside]
posted by lord_yo on Nov 14, 2011 - 10 answers

How do I find a mean response confidence interval in nonlinear regression?

How do I calculate the confidence interval for the mean response of some general nonlinear fit? [more inside]
posted by selenized on Nov 7, 2011 - 12 answers

Can you give me stats direction? Yes/No?

(StatisticsFilter) I'd like to compare two binomial variables from the same population... [more inside]
posted by slab_lizard on Nov 6, 2011 - 8 answers

What are the best methods for this type of survey?

What sort of survey are my colleagues planning? It would involve questionnaires dropped off at a variety of businesses (tour agencies and hotels, mostly), aimed at capturing details about their clients. This doesn't seem to fit the examples I see discussed in online resources on survey methods. To top it off, both the time frame and budget are limited. Where can I find best practices for this sort of survey--and how can I determine which best practices should be given highest priority? [more inside]
posted by col_pogo on Oct 14, 2011 - 6 answers

You R to do this again, and again, and again...

[StatsFilter] I have a data set which consists of 1000 groups. I'd like to perform the same commands on each group using the statistical software R. How can I write a loop function to perform this task? Or would any of the functions from the *apply family do a better job? [more inside]
posted by fix on Oct 10, 2011 - 12 answers

Crime Rate Statistics

Please clear up the use of statistics by two people trying to compare crime rates in one huge city (NYC) to Charleston, SC. a much smaller city. [more inside]
posted by Elsie on Sep 29, 2011 - 25 answers

Where is religiosity growing and where is it shrinking?

Where is religiosity growing and where is it shrinking? [more inside]
posted by iftheaccidentwill on Sep 23, 2011 - 5 answers

number of U.S. products containing HFCS

I'm trying to find the number of food products that are sold in the U.S. that contain high fructose corn syrup. I've done some preliminary searches and have found some lists, but I've come up dry when trying to find actual numbers. I'd like a reliable source that I can cite, but I'll take almost anything at this point. I am at a university and have access to a large number of subscription database resources, so I'll keep looking. But I thought metafilter might be able to help out here.
posted by pahool on Sep 15, 2011 - 6 answers

Based on my eyes and a hunch I conclude these two variables are statistically different?

How can I test if one predictor variable in a regression is significantly better than another predictor variable? i.e. If I regress X against A I get an r^2 of .99 and when I regress X against B I get .98. I need a test to see whether this difference is statistically significant. [more inside]
posted by vegetableagony on Sep 13, 2011 - 16 answers

Probability Question

Probability Question [more inside]
posted by nickhb on Sep 3, 2011 - 15 answers

How do TV channels figure out how many people watched a particular episode (e.g. XX million watched American Idol)?

How do TV channels figure out how many people watched a particular episode (e.g. XX million watched American Idol)? I often hear things like XX million viewers watched American Idol or some other show. How do the news guys / broadcasters come up with these numbers?? Surely they are not able to track what is being watched in peoples homes. So I guess this is some kind of math or projection. Any idea how this is done?
posted by r2d2 on Aug 27, 2011 - 17 answers

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