## How to read statistics accurately

I know the risk of SIDS is quite low. I can't figure out just how low given that some of the factors are preventable.
posted by JoannaC on Jan 5, 2017 - 8 answers

## Help me explain nominal, ordinal, and interval data, and means and modes

I'm on a project that is collecting ordinal data through surveys - for instance 'How satisfied are you with product X on a scale of 1-10?' We are analyzing and producing charts etc. using the mean as the reporting unit. I think this is wrong, and we should be using the mode. So: What are accessible and authoritative sources that I can read up on and also point to that show why we should be using the mode and not the mean?
posted by carter on Jan 5, 2017 - 11 answers

## Tracking Trump's Term

I want to keep track of how Trump "Makes America Great Again" during his term. What should I keep track of, and from which sources?
posted by kirkaracha on Dec 2, 2016 - 9 answers

## Career change 101 (finance / accounting / statistics edition)

I am wanting to shift careers toward finance, accounting, statistics, or something else quantitative. Ideally, I'd like to find a role that can be done as a freelancer. I'm a bit uncertain how to even start.
posted by Dollar Dollar Bill Sock on Sep 29, 2016 - 6 answers

## Too Many Strata To Sample

I have multiple independent variables that I want to stratify my sampling across, but the result would be way more strata than I can sample. Is there a way to stratify across different character states for each independent variable without creating strata for the interactions of each? Example inside.
posted by agentofselection on Sep 21, 2016 - 6 answers

## I was told there would be no math.

I've crossed a bunch of plants with one another, and now have a bunch of berries on those plants. Each berry can contain way more seeds than I have room to pot up and grow out individually, so I'm trying to find the point of diminishing returns, where potting up additional seedlings stops giving me new and interesting results, but my math background is inadequate.

## Where do people keep their guns?

I want to know where gun owners tend to keep their guns. As I reason, there are only a few places that can be; (1) at home, (2) in their car or (3) on their person. Are there any statistics or studies that show where people keep their primary firearm - one they may say is mostly for protection as opposed to hunting or target practice (even though that firearm may be used interchangeably by some owners)?
posted by CollectiveMind on Jul 31, 2016 - 13 answers

## How to present and evaluate data relative to weight

I could use some help walking through this: I have Excel data that means more or less depending on where it comes from. When I'm working with it, presenting it, or thinking about it, I want to treat it differently depending on origin. Example within.
posted by A Terrible Llama on Jul 19, 2016 - 11 answers

## Can I find out how many LGBT youth there are in my metro area?

Any ideas on where I can find a reasonably accurate estimate of the LGBT Youth population in the St. Louis metropolitan area? I've tried several things (listed inside) but keep coming up empty.
posted by Ufez Jones on Jun 10, 2016 - 6 answers

## Non-academic career suggestions for Psychology PhD

I am considering leaving a tenure-track faculty position in Psychology in order to have a more normal life. I would be very grateful for suggestions on non-academic careers. More inside.
posted by anonymous on Jun 8, 2016 - 28 answers

## Best cheap or free resources for learning R?

I'm looking for some help cutting through the mix of crap that Google throws up and finding some quality free (or very inexpensive) resources for learning the statistical programming language R.
posted by Anticipation Of A New Lover's Arrival, The on May 27, 2016 - 8 answers

## Statistics and neural network mid-level books

I have a computer science background, but never got much formal training in statistics. I'm working more with data from psychological experiments and am interested in neural networks to model human behavior. I'm looking for two books (or maybe more): an intermediate book on statistics focused on applications in psychology and a basic book in modern neural networks.
posted by demiurge on Apr 26, 2016 - 2 answers

## Help me turn student grades into informative statistics with charts.

TA/Instructor looking for an easy way to plug in a list of grades and get statistical information back, preferably in chart form. I would like to see things like the mean, median, and standard deviation, and a visual representation of the the distribution.
posted by jamaal on Apr 25, 2016 - 10 answers

## What is the funniest statistics-related joke that you know?

Please tell me the funniest statistics-related joke or jokes that you know. I give talks and run workshops about statistical concepts - broadly defined - to mixed audiences. Jokes will be used as ice-breakers. The ideal joke will be funny to everybody, and doubly funny to statisticians.
posted by Erinaceus europaeus on Apr 21, 2016 - 26 answers

## Math problem alert: NCAA Magic or Unsurprising?

We had a NCAA March Madness contest at work, where about 40 of us all filled out brackets on ESPN's site. One of us - the winner of our group - did very well and ended up ranked 6000th out of all 13 million ESPN brackets - top .05%. My question is, was this really statistically unlikely or, given that there were 40 of us, is it unsurprising one of us did that well (e.g., the birthday problem)? What mathematical tools would one use evaluate this question? Thanks!
posted by slide on Apr 6, 2016 - 9 answers

## How to talk numbers and not-numbers

Over the years as a researcher in the humanities and social sciences I have often made vague comments expressing an intuition, or perhaps a bias, that quantitative analysis and statistical models often made by e.g. economics, quantitative political science and other math-fetishistic disciplines miss or misrepresent truths about human behaviour and society, which are messier and less easy to quantify than these disciplines assume. I would like to be more able to talk about this in detail and with greater specificity of examples than I currently am. More below...
posted by starcrust on Apr 6, 2016 - 16 answers

## Statistical framing of the engineering and extremism article

Reading this article on the blue got me thinking about conditional probabilities, prediction and causality. I came up with an analytical framing of what I think the article is saying and would be grateful if stats/social science Mefites could tell me if it seems accurate or else set me right.
posted by mister_kaupungister on Mar 25, 2016 - 3 answers

## (Good) Websites for Chinese Economic Indicators?

I am looking for good and up to date websites for Chinese economic indicators. GPD, PPI, CES, Import/Export changes, shadow stats, etc. Preferably updated monthly. Does something like the Case Schiller index exists for China?
posted by yoyo_nyc on Mar 13, 2016 - 1 answer

## Career changes for a data analyst?

I've been doing data analysis for about 8 years, and I feel stuck. Where to next?
posted by Claubert on Mar 9, 2016 - 13 answers

## RRPQBBQ

How exactly do you score this Reactions to Research Participation Questionnaire Revised (RRPQ-R) form? I see some hints on the last page, but what steps would a researcher take to turn a stack of completed forms into data the proper way? I could take a guess but I'm curious to know the actual method. Google is seemingly empty of the answer. I do not think I have access to the sources on the last page.
posted by michaelh on Feb 29, 2016 - 4 answers

## Statistics reference?

Is there a standard statistics reference that I can buy for easy . . . reference? I'm looking for something that is more encylopedic than a textbook. It doesn't have to be an exhaustive resource, but one that contains most of the standard methods and practices, as well as decent explanations of the statistical theories behind them.
posted by Think_Long on Feb 16, 2016 - 5 answers

## How hard would it be to study statistics at this point?

I'm thinking of starting a graduate program that requires rigorous training in statistics. It's been a LONG TIME since I've done any math at all, and even then, I wasn't great at it. Is this too ambitious?
posted by heavenknows on Feb 13, 2016 - 25 answers

## Can you help me explain diabetes to a cranky old guy?

Family member (FM), mid-seventies, healthy (some mild arthritis), stubborn. Talked into getting blood work and doctor exam because of family history of kidney problems. Kidneys are great, everything is great, except his blood sugar levels. Doctor says "diabetic," FM very resistant to diagnosis, doctor unable to explain in a way he can understand. I'm the one he talks to most freely, so ... how do I explain this when I don't understand it very well myself? Seeking explanations, and sources if possible.
posted by kestralwing on Jan 4, 2016 - 21 answers

## Basic statistics question

I have the results of a survey, along with a couple of basic descriptive statistics. I'm trying to determine how they were calculated and my one semester of stats isn't holding up. Could you help? Details inside.
posted by Think_Long on Dec 4, 2015 - 14 answers

## Quick Data Collection Problem

I have a CSV with one column that contains User IDs. I need to make another CSV that counts how many times each User ID appears in the document, and output it to another CSV That has something like UID1 >> 3; UID4 >> 1; UID20 >> 0. There are thousands of User IDs, so I need to be able to set up a range for it to scan for. Is this possible with free software and not much programming expertise?
posted by codacorolla on Nov 10, 2015 - 8 answers

## Reliable demographic information on tertiary students globally

I need to find out accurate information showing the quantity of university/tertiary/higher education students and lecturers, by age, for Australia and internationally.
posted by b33j on Nov 8, 2015 - 2 answers

## What Do I Do With All This Data?

I have a research project involving about ~90 subjects in two (self-selected) groups. I have collected a number of variables about these subjects (from public sources), and now I would like to do some statistical tests to say whether these variables are significantly correlated with membership in one group or the other. How do I do this? I have a basic knowledge of R and access to Stata 14.
posted by jedicus on Oct 22, 2015 - 10 answers

## Can an exact measurement ever be statistically insignificant?

I am dubious of a colleague’s assertions about statistics.
posted by lakeroon on Oct 14, 2015 - 23 answers

## Statistics; correlations for a subset of a timeseries of points?

I have a time series of data - number of "detections" per hour, over time. Each of these points also has two attributes associated with it, x and y. I also have a second time series of data which I expect to correlate with that number of detections per hour, but only with detections within certain combinations of those x and y values. I want to find what range of x and y values has the best correlation.
posted by Jimbob on Oct 5, 2015 - 6 answers

## Police Stops and/or Violent Interactions initiated by Burnt out Bulbs

Is there any research, discussions or statistics that link burnt out car bulbs to police stops, and then to either police shootings or anything related violent interactions between arrestees and police?
posted by CollectiveMind on Oct 5, 2015 - 1 answer

## Quincunx for non-Gaussian distributions?

Galton's quincunx machine was a machine to demonstrate the bell curve. Are there any such machines for non-Gaussian probability distributions?
posted by curuinor on Jul 31, 2015 - 12 answers

## Averaging standard deviations for combined populations

This seems like an easy question but my math skills are underdeveloped, and I do not understand the answers I've found through Google. I would like to know how to appropriately average together standard deviations when all I have is the means, sample sizes, and standard deviations for two or more groups.
posted by fucker on Jul 20, 2015 - 19 answers

## Graduate Student Needs Statistics Software Help

Choosing a BUGS software package...one with a comprehensible manual or understandable tutorial to allow progress to continue on thesis.
posted by maxwelton on Jul 12, 2015 - 6 answers

## Lies, Damn Lies, and Pregnancy Statistics

There is a statistic that gets thrown at all women trying to get pregnant stating that each month that you only have a 20% chance of getting pregnant assuming each partner is fertile and otherwise healthy. This seems super low (and depressing and discouraging) to me. What gives?
posted by Suffocating Kitty on Jun 17, 2015 - 19 answers

## And then the kangaroo said, "did you bring the vitamins?"

Years ago my college roommate took a statistics course. In the textbook was a small, confounding cartoon that appeared to make no sense but was hilarious in its absurdity. I would like to know about that cartoon.
posted by phunniemee on Jun 8, 2015 - 8 answers

## Calculating the probability of a scenario that might happen by chance

I have to validate some input for a database, and I want to present the user with a mathematically accurate estimate of the percentage of data that they entered which may be invalid. The problem is that valid data looks like invalid data 10% of the time.
posted by zixyer on May 8, 2015 - 12 answers

## Are there statistics about Americans and meditation?

I'm curious about how many Americans have been exposed to meditation and mindfulness, and to what degree. I've had a difficult time finding research about these and related statistics. Can anyone point me in the right direction?
posted by zenja72 on May 8, 2015 - 6 answers

## Where to find Wikipedia Statistics?

I'm looking for something like the most popular/visited pages for each month (or week, or day) since Wikipedia's debut. I found the Top 25 list which would be perfect if it wasn't for the fact that it starts only in 2013. I'd like to go back as many year as possible. I combed through the statistics department but I can't find anything usable except for a couple of "Top N" pages for a single year. Most pages or sections refer to just little samples and examples. Thanks a lot for any hints Chris
posted by caudingo on May 7, 2015 - 2 answers

## Making sense of multivariable statistics (with infographics?)

I'm working with some multi-variable data (up to 12 factors per event, from a possible 28 factors) so far I've only seen it discussed as a combination of two factors. Is there a way to elegantly (or at least clearly) display inter-relations of more features? I realize 12 factors is a lot, so anything more than 2 factors would be an improvement.
posted by filthy light thief on May 6, 2015 - 5 answers

## Question about demographic research project

My question is about how to find someone who can appropriately choose a representative set of zip codes from a larger set. How could I get someone to choose, in an intellectually defensible way, a list of 30 to 50 zip codes that essentially represent my entire state? In other words, how could I come up with a list of 30 to 50 zip codes that economically/demographically are a representative subset of the entire state?
posted by Mr. Justice on Apr 28, 2015 - 3 answers

## Cubicle Denizen Dilemma: the name for an “average” if the data are weird

Our company has decided to measure the jobs we do by assigning points to tasks. The problem here is that departments don’t do the same thing, or the same amount of things. What concerns me is that the company wants to publish a company-wide average, against which members in each department will be compared.
posted by Prof Iterole on Apr 20, 2015 - 8 answers

## SAS/proc phreg code

Anyone familiar with proc phreg (Cox regression/survival analysis) in SAS who could help me figure out if my code is right? I'm new to survival analysis and my data are set up a little differently than the examples I'm seeing online so I'm not sure I'm doing it right.
posted by quiet coyote on Apr 7, 2015 - 6 answers

## What's the right method for this?

I am undertaking a fun statistical project, and I need help...
posted by zug on Apr 5, 2015 - 8 answers

## Help me not screw up teaching my students about p-values

I am a TA in an introductory college biology lab. Soon, I have to teach a class of mostly freshmen about t-tests and p-values in conjunction with a field experiment that they are conducting and on which they will have to write a report. I want to make sure I do this right—help me!
posted by Anticipation Of A New Lover's Arrival, The on Mar 25, 2015 - 14 answers

## How to give myself a remedial science education

So I was recently faced with a serious health care decision, and the people advising me strongly disagreed with each other, which made me realize something: I don't know enough science to make well-reasoned decisions for myself and my family. Help me figure out a DIY way to make up the gaps.
posted by feets on Mar 24, 2015 - 15 answers

## Extremely basic statistical question

My state has 709 zip codes. I want to draw reasonably well-grounded conclusions about the entire population of my state (having to do with insurance coverage and ACA subsidies, if you're interested). How many zip codes should I sample?
posted by Mr. Justice on Feb 24, 2015 - 18 answers

## Probability distributions and their practical applications

I am looking for a resource that lists probability distributions and their common real-world applications. For example, I'd expect to see: Lognormal - daily returns in the stock market. Poisson - failure rates for mechanical equipment, ...
posted by wivy on Feb 19, 2015 - 6 answers

## The amount of autistic people in the United States

If autism is diagnosed in 1 of 68 children, and there are 381 million people in the country, can I use these two facts to find out how many people in the US are autistic?
posted by motioncityshakespeare on Feb 19, 2015 - 10 answers

## Best or most appropriate Statistic method to Use.

I have a statistics and/or probability question and the last time I took a statistics class Vanilla Ice and Andrew "Dice Clay" were multi-millionaires. I am not looking for a problem to be solved, I am asking what statistical technique should I use to determine if a time series of data is due to randomness or not.
posted by otto42 on Jan 27, 2015 - 12 answers

## Gameshow Inspired Statistics Question

I recently came up with a statistical thought experiment from watching too many reality game shows, but I'm having trouble remembering how to solve a problem like this. Help me figure out this problem that's been bugging me (and by extension relearn some statistics I've forgotten).
posted by fremen on Jan 21, 2015 - 4 answers

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