Bayesian R-INLA?

Hi everyone, ​ I’m an MSc student studying ecology and currently working on my thesis. I need to do a patio-temporal analysis and the Bayesian Hierarchical Model R-INLA (r-inla.org) seems like it could be quite interesting. HOWEVER, I have minimal to zero statistical experience and am struggling quite a bit with understanding. ​ So I guess a couple questions: Has anyone ever used R-INLA and has advice for learning it as a beginner? Does anyone have any alternatives they think might be interesting for a spatio-temporal analysis? ​ If you would like more info on my thesis, feel free to DM me. Any help/advice/comments whatsoever would be immensely appreciated. submitted by /u/rainbowredwood [link] [comments]

Using PSPP and exact tests

Hi All, I have posted before about my current issue, but it was recommended by a stats professor at my university that instead of using a Chi Square test I should attempt an exact test because my sampled groups’ responses were so low. ​ I created a 10 question survey and then each question had a ranking answer of 1-5 with 1 being strongly disagree and 5 being strongly agree. The main variable is the students major which they chose from a list in the survey. SO now I am attempting to see if there was a significant difference in the way one major answered versus another major. ​ I am using PSPP and it was recommended I use a Kruskal-Wallis test…However that did not seem to work. I got a bunch fo NaNs and nothing pulling individual majors results. I have a screenshot of what I got and my raw data if it is of any interest to anyone. Any suggestions are appreciated! submitted by /u/tigerjust0001 [link] [comments]

Research Papers involving 2 Way ANOVA

Hi Folks at r/statistics, I’m currently attending a class that seeks to introduce statistical techniques. I’m particularly interested in the application of a 2 Way ANOVA. I would like to ask if anyone could provide some links to research papers that includes 2 Way ANOVA in their methodology (or any other statistical techniques is fine too). It would be preferable if the research paper would include parts such as; Breaking down the problem, Hypothesis testing with 2 Way ANOVA along with other further testing and conclusion.My apologies with this is the incorrect subreddit to approach. It would be highly appreciated if I could be direct to the proper subreddit for my request. submitted by /u/CeeZack [link] [comments]

Value at Risk calculation, without portfolio value. Are my calculations correct?

Hi! I’m doing a VaR calculation and just wondering if my numbers are correct. This calculation is without a portfolio value, so just the percentages of losses to be expected at a 95 % confidence level. ​ My = 1,12 Critical value for n>1000 = 1.645 Sigma = 0,44 ​ Based on these number, I’ve used the formula: Var= -X + σ*tα , IE: -1,12 + 0,44*1,645 = -0.3962. Based on my numbers, I will not lose more than 39,62 % of my portfolio in the 5 % worst of cases, or is it 1-0,3962 = 0,6038 = 60,38 %? submitted by /u/frysinatoren [link] [comments]

Statistical method for comparing two curves?

I just finished taking an AP Statistics course and for our final project, we have preform an experiment and analyze our data. I thought it would be cool to gather words used on thousands of subreddits and see how closely the distribution follows Zipf’s Law. If the data perfectly follows Zipfs law, it can be modeled by y=a*(1/x) where a is the occurrence for the word that appeared the most and x is the word’s ranking. After preforming a power regression on the data where a was kept constant, I got the model y=a*(1/(x^-0.678002)). The only test I learned in class that would seem applicable was chi squared but that doesn’t describe the data in the way that I want. Is there any other kind of test I can use to compare the two models and draw a conclusion of how closely it follows Zipfs law? submitted by /u/QuantumPie_ [link] [comments]

What’s your preferred method to interpolate scattered XYZ data?

There are lots of choices: Inverse Distance Weighting, Modified Quadratic Shepard, Akima’s Cubic Spline, Biharmonic Splines, Multilevel B Splines, etc. Just an informal survey, what are your favorites? For me, IDW for fast and robust. Biharmonic for local smooth but smaller data sets. submitted by /u/true_unbeliever [link] [comments]

Could use a second opinion on the interpretation of my moderation results – Dyadic Research

Hey all, Like it says in the title, I would like to hand in my thesis in 2 days, and I did a rerun of some of my analyses yesterday and (probably) stumbled upon an unexpected interaction effect. A lot depends on this one effect so I’m getting a bit stressed out. I could really use a second opinion and a ‘mental ping pong partner’, for 5-10 minutes. If somebody with knowledge about moderation / dyadic research could help me, it would mean the world. Thanks in advance for taking the time to read this. submitted by /u/SirWhanksalot [link] [comments]