# Tagged Questions

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### What is Polychoric Correlation Coefficient intuitively?

There is clear meaning of Pearson product-moment correlation coefficient: it is cosine of angle between two vectors based on variables. Also there are 12 other ways to clearify the meaning of ...
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### How to correctly assess the correlation between ordinal and a continuous variable?

I'd like to estimate the correlation between: An ordinal variable: subjects are asked to rate their preference for 6 types of fruit on a 1-5 scale (ranging from very disgusting to very tasty) On ...
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### Ordinal Regression

In my data, the response variable is ordinal and there are 16 predicting variables which are also ordinal. I plan to perform an ordinal regression. But before doing that I want to graphically show the ...
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### Correlation coefficient for non-dichotomous nominal variable and ordinal/numeric variable

I've already read all the pages in this site trying to find the answer to my problem but no one seems to be the right one form me... First I explain you the kind of data I'm working with... Let's ...
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### Simulation for ordinal random variable utilizing multiple correlation

I need to design a simulation procedure for an ordinal variable, $Y$. I have data from a number of other ordinal variables $X_1,...,X_k$. What I want is: a) to define (or chose, I know some exist) ...
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### What is the Net Promoter Score Data Type

As many people know Net Promoter Score is a customer feedback measure calculated from the response to the question: "How likely would you be to recommend [us] to a friend or colleague". The response ...
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### How can I do a correlation between Likert scale and an ordinal categorical measure?

I have a 5 pt Likert scale and a measure of time on the internet e.g. 1= less than 10 mins, 2=10-30 etc as well as number of SNS contacts (1=10-30, etc). I would like to estimate their correlation but ...
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### How can you run a correlation coefficient test among two ordinal variables with uneven scales?

I have two ordinal variables which are set on different scales. The variables were extracted from a questionnaire. The first variable ranges from -12 to +12 with a step of 1 width, ( -12, ...
734 views

I’m using Stata 12.0, and I’ve downloaded the polychoricpca command written by Stas Kolenikov, which I wanted to use with data that includes a mix of categorical ...
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### Measuring statistical significance using correlation of ranked (ordinal) data

I am trying to do hypothesis testing and am wondering if I am setting up this problem correctly: My hypothesis is that the reviews of the computer parts for a computer model 'M' on website A ...
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### About correlation of ordinal variables having different number of categories and about correlation of mixed type of variables

I have three questions: For data with different response categories (likert type or ordinal) what type of correlation should be calculated? I know for ordinal variables Spearman's rank correlation ...