Top new questions this week:
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Quantile regression allows to estimate a conditional quantile for y (like e.g. the median of y,…) from data x. I do not see any distributional assumptions about y being made. This seems in contrast …
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I am trying to answer the following question from my quantum mechanics textbook and my probability theory is admittedly rusty (this is not schoolwork as should be clear from my post history on Phys …
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Given $n+1$ variables $p_0, p_1, \ldots, p_n$ defined over $\mathbb{R}^{+}$ so that $\sum_{i=0}^np_i=1$, and given a real number $1<x<n$, I want to generate random solutions of the equation so …
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I ran ANOVA with dependent variable IQ, independent variable field of study (3 groups: science, humanities, business), and two covariates (age and sex). I see that my result is not quite significant, …
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Consider a kernel density estimate of a continuous, non-negative random variable defined over the unit circle with no discontinuity between 360 and 0 degrees. Unlike in the most common KDE …
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I was reading about weight initialization in neural networks (He et. al, 2015) when I came across this statement: “If we let $w_{l-1}$ have a symmetric distribution around zero and $b_{l} = 0$, …
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I’m making some self-study notes for Markov chain Monte Carlo (MCMC) and want to check my understanding before proceeding. After reading a few papers and tutorials this is what I’ve synthesised: What …
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Greatest hits from previous weeks:
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I am training a simple neural network on the CIFAR10 dataset. After some time, validation loss started to increase, whereas validation accuracy is also increasing. The test loss and test accuracy …
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I’m using Python Keras package for neural network. This is the link. Is batch_size equals to number of test samples? From …
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Principal component analysis (PCA) can be used for dimensionality reduction. After such dimensionality reduction is performed, how can one approximately reconstruct the original variables/features …
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I have plotted this after I did a Shapiro-Wilk normality test. The test showed that it is likely that the population is normally distributed. However, how to see this “behaviour” on this plot? …
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Maybe the concept, why it’s used, and an example.
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Are multiple and multivariate regression really different? What is a variate anyways?
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I have data that has eta squared values and partial eta squared values calculated as a measure of effect size for group mean differences. What is the difference between eta squared and partial eta …
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Can you answer these questions?
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I have a large set of objects that each generate a multivariate time series at a daily to hourly resolution. As an example, let’s say that they are weather stations generating variables for …
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I developed a new forecasting model with the aim of replacing an older model. I conducted 12 backtests and need to predict only one quarter ahead. Overall, my new model performs better than the older …
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I have a data set on a large group of long-term stroke survivors. I need to determine whether there is a difference in ability (on a scale of 1-10) between their left and right arms. The ordinal data …
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