# Tagged Questions

Ranking is ordering data from highest to lowest or *vice versa.* For questions about *constructing* scores to use in ranking, please use the "valuation" tag, too.

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### Observation dependency in logistic regression to learn relevance of search results

I want to predict the most relevant item from a set of search results resulting from a query. Moreover, these items are places; the query is at a lat/long and time; and the search results are ...
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### How many « degrees of freedom » should a Wilcoxon rank-sum test have?

I would like to perform a Mann-Whitney U Test (also called Wilcoxon rank-sum test) on a weighted sample in R. Such a non-parametric test is required, as neither of the two variables used follow normal ...
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### Ranking data sets by means etc. (unequal sample size and variance)

I want to rank several lists of data by their tendency to be larger or their capacity to be larger when extrapolated. Is there a way to do this effectively?
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### How do I treat binary variables when creating a rank for different companies

I am currently doing a project to create a rank for different companies base on numbers of metrics that are available to me. My first thought is to normalize all the numerical variables. I am ...
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### How Do I Rank the GPA of Students from Different Colleges?

I have data from 100 students, each at a different college would like to rank them by GPA. I have the following data for each: The student's GPA: example 3.25 The all student average: 3.10 The ...
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### best approach to model search ranking for an ecommerce site

I am trying to build a model to rank search results in my ecommerce site. I am ideally trying to rank results that are relevant to the user query and in turn would result in a sale. I have text score (...
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### I have 12 items to get into a single rank order. Can I get this from having a few hundred people see a set of 10 of the possible pairs of items?

I attempted to run a study where people had to rank order 12 statements from best to worst. However, it was extremely messy and difficult for people to rank that many items. Now, my professor and I ...
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### methods to validate effectiveness of ranking system?

I seek to compare the effects of different rating-based ranking methods and examine which ranking would lead to higher sales (i.e., which is ranking is superior to increase customer conversion rate). ...
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### Learning to Rank with no queries

I want to rank (order by relevance) some data, and I currently have some labeled observations (relevance scores given by a user) and some unlabeled observations. I'm currently studying learning to ...
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### Can rank variables be iid?

I'm curious about the responses to some questions I've found on this site -- but I can't post comments yet, so I am starting a new question. At least two people have asked about regression to predict ...
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### weighting matches by time and variance

I'm putting together a rating system for hockey teams and have data on the number of goals conceded for each team in each game. I would like to come up with a weighting that gives less erratic results ...
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### Ranking districts (on basis of % cahnge) after controlling initial conditions

We want to rank Indian districts as good/bad/average performer on the basis of change in access to latrine between 2001 and 2011. We calculate the percentage point change in access to latrine ...
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### Score Scaling for ranking problems

I am working on a problem, where I might want to switch out between Model A and Model B both of which are used to make recommendations of the type >. The scores are in descending orders. The output of ...
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### Normalization of values

How do I normalize a set of data? Let's say we are looking at measurements of diameter of the heart in women and men. Men will have bigger hearts, so error in measuring by the observers will always be ...
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### How to perform ordinal regression with rank-based dependent variable?

I have a dataset I'm about to use for some preliminary testing. However, I've stumbled onto a puzzle which I cannot seem to figure out. https://drive.google.com/file/d/0BzfbOrk7Ans7UGdEbzZtR2NqT0k/...
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### Modeling bias in reviews of conference papers

An article in Science Magazine claims that A little bias in peer review scores can translate into big money, simulation finds . The paper referred to there is paywalled, though. Can anyone point me to ...
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### Weighted arithmetic mean's alternative for ranking items

I have a Blog post ranking algorithm which has 5 factors which are considered for calculating final score. I have predefined input range according to which i decide score of a factor. e.g. Factor : ...
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### Averaging rankings of small geographical areas to find an average ranking for a larger area

I have a friend who is very intelligent with a professional background in accountancy but no formal mathematical or scientific training. He is studying for a PhD (as a mature student) looking at how ...
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### Specifying an HLM model in SPSS (ranking data)

In SPSS, I am receiving the error: The final Hessian matrix is not positive definite although all convergence criteria are satisfied. And when looking at the output, it is telling me that the ...