What is your favorite "data analysis" cartoon? - Cross Validated
385. Data analysis cartoons can be useful for many reasons: they help communicate; they show that quantitative people have a sense of humor too; they can instigate good teaching …
Explain the xkcd jelly bean comic: What makes it funny?
2014年2月27日 · $\begingroup$ @Glen_b, the favorite data analysis cartoon thread is appropriately CW, however, I see no reason this one should be. 'Why funny' aside, the …
references - Statistics Jokes - Cross Validated
75. A mathematician, a physicist and a statistician went hunting for deer. When they chanced upon one buck lounging about, the mathematician fired first, missing the buck's nose by a few …
Examples for teaching: Correlation does not mean causation
83. There is an old saying: "Correlation does not mean causation". When I teach, I tend to use the following standard examples to illustrate this point: number of storks and birth rate in Denmark; …
data transformation - How to transform leptokurtic distribution to ...
Well, we can estimate the parameters of the distribution using MLE (or for methods of moments use IGMM()), ## mu_y = 2052; sigma_y = 491; skewness = 0; kurtosis = 13. and then use the …
How to calculate the signal-to-noise ratio (SNR) in an image?
This is an 'active' (or at least open) field of research. There are a few data driven methods to determine SNR on a single image, that exploit some assumptions on the spectral properties of …
What's a real-world example of "overfitting"? - Cross Validated
2014年12月11日 · 20. The analysis that may have contributed to the Fukushima disaster is an example of overfitting. There is a well known relationship in Earth Science that describes the …
Imputation before or after splitting into train and test?
In this case, if you impute first with train+valid data set and split next, then you have used validation data set before you built your model, which is how a data leakage problem comes …
RNNs for Non-sequential Data - Cross Validated
2017年3月29日 · TLDR; RNN (especially Long-Term-Short-Term) allow you to specify a prior belief about relationships between events in "time", so you could benefit from it if those events …
Analyzing Ranked Data: Correlation and Factor Analysis?
2015年3月14日 · Whatever factor analysis or other multivariate analysis you do on the rankings data you should be aware that the ordered multinomial (no ties) nature of ranking task induces …