# Questions tagged [data-analysis]

Questions on the use of mathematical techniques to extract properties from given data. Consider if your question might be more suited for Cross Validated (stats.SE) instead.

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18 views

### Unequal observation Two-Way ANOVA

Righto, I have some data on fish. I want to compare the weight of male and female (F = 1) fish across different ponds (Ponds 1 to 4) so using a two-way ANOVA. I want to do this in Excel, using a Two-...
54 views

### Combinations of Groups of People and the Probability of People being in the Same Group?

Question: Ms. Vena has 25 students in her class. For the next lesson, she would like to put the students into groups of 5. What is the probability that Samantha and Daniel are in the same group? ...
1 vote
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### Data smoothing with controlled smoothing error

Say I have a data sets $X$ and $T$ of $n$ measurements at $n$ distinct times. The data is slow varying and relatively non-noisy. I want to smooth the data with some curve or a set of piecewise ...
1 vote
48 views

### sorting functions by amount of conditions for a random dataset to be described using it?

Given a finite dataset like 1, 2, 3, 4 You could find infinite functions, for simplicity I found 2: Add 1 for the next data point, so the sequence continues as 5, 6, etc. 2.Cycle through 1, 2, 3, 4, ...
36 views

### Interpreting this Table [closed]

I was just wondering if there was a given name to these kinds of tables? I have trouble interpreting them and would like to do further research but don't know the name of said table.
32 views

### How to compare real-time physiological data between pre-defined time blocks

I have a set of physiological data for approx. 20 patients measured per second over approximately 8 to 10 minutes. The data is grouped into the following blocks of time: calibration, test, first ...
1 vote
73 views

### Differences Between Modified Kolmogorov-Smirnov and Van der Waerden Tests

I am trying to understand the differences between the Modified Kolmogorov-Smirnov test and the Van der Waerden test. I am new to this and struggling to grasp their distinct features. Specifically, ...
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### Splitting upon insertion in hierarchical clustering

It's my understanding that, upon the insertion of a new element, complete-link hierarchical clustering can lead the splitting of a cluster so as to maintain its "spherical compactness". Do ...
• 153
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### Appropriateness of one observation per unique combination of dummy variables

I am wondering what conclusions you can draw regarding the coefficients of an OLS model when you only have one observation per combination of unique dummy variables. I have seen someone else do this ...
14 views

### Finding weights from a linear system

I have a dataset with n individuals and each individual is randomly assigned codes from m possible integer codes. The structure is such that if a person contains multiple codes then each code is ...
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### Understanding the Reasoning Behind the Growth Function $m_{\mathcal{H}}(N)=2^N$ for Convex Sets

I am currently reading Learning from Data by Abu-Mostafa et al. and I am struggling to understand the reasoning behind the growth function $m_{\mathcal{H}}(N)=2^N$ for convex sets. Here is the ...
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1 vote
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### Challenges with a Multi-label Regression Problem in a Real Estate Dataset

I am currently conducting a research where I aim to predict the selling price and deal execution time of properties in NY. To do this, I have a dataset of various properties sold in NY, containing ...
65 views

### Percentage of values between 3 standard deviations and 4 standard deviations.

After learning about the empirical rule / 68-95-99.7 rule, I am just wondering about the percentage of values 4 standard deviations from the mean. This question is pretty much the same as the ...
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29 views

### Tricky Bar Graph or Histogram [closed]

I am trying to determine if this is a bar graph or a histogram. It's the distribution of American families by income. This has been such a struggle for me, but I'm sure there's a simple explanation. ...
• 15
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### How do we combine sensitivity in differential privacy with Lipschitz continuous?

The definition of sensitivity in differential privacy is: $s_{GS}(f) = max_{D1,D2}\|f(D_1)-f(D2)\|$ for two neighboring datasets $D_1, D_2$ (take global $l_1$ sensitivity as an example here), many ...
10 views

### Compare and Represent Data With Different Number of Elements

I have N entities that I want to compare them to; for example, A has 5 options, B has 3 options, and C has 6 options. 1 means an option exists, 0 otherwise as in the example next: A = [1 1 0 1 1] (...
• 101
8 views

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### Unifying multiple sample data

I would like to unify multiple sample data (of different sizes) into some "unified sample" to evaluate its collective variance. Is this something statisticians do? I thought of unifying ...