# All Questions

146,409 questions
Filter by
Sorted by
Tagged with
9 views

### What statistical test is most appropriate when my data consist of multiple series, each based on an individual sample?

I'm trying to determine the effect of an interferent $X$ on the measurement of a substance $Y$. Ultimately, I'm looking to predict $Y_{actual}$ within a confidence interval, given $Y_{observed}$ and a ...
23 views

### Which test is suitable in below situation?

I want to calculate the correlation of two continuous variables, unfortunately both of them are not normally distributed. (by using Shapiro-Wilk test) There are two categorical confounding variables ...
26 views

### Maximum of an iid Gumbel Distribution for a Second Choice term (conditional on the first choice)

I am trying to understand the extension of Small and Rosen's (1981) closed form solution for compensating variation, as found in Fan (2013). In Fan's model consumers are choosing to subscribe to ...
11 views

### Combining a neural network classifier with genetic algorithm to do the task likes what generative adversarial network does?

Recently I read some materials about GANs(Generative adversarial network). I know that GANs uses a discriminator network to distinguish the expected output(let's say that it's an image),and a ...
17 views

### Expected value of an AR(1)

Consider the AR(1) model y_t=α+βy_(t-1)+e_t Where the errors are white noise N(0, 1). What is the expected value of y_t.
7 views

### Correcting for known imputation bias

I have a survey sample which includes income values by type of income for a significant number of high-income households. Some of the income data is measured, i.e. present in the responses of the ...
11 views

### Assigning Weighting Factors

I have a hypothetical example that closes to my research problem: Assume you are a boss and you have different types of tasks that you need to assign to your employee. Sensitive task (very classified)...
10 views

6 views

### What's the best way to store BERT training data (input IDs)

The tricky thing about the input IDs is what they're varying in length for each data sample, so regular hdf5 may not be ideal. Since Bert is so popular I am wondering if there's an established way to ...
4 views

31 views

### Find $\alpha$ and $\beta$ so that $f_X(x)$ can be a density function

\begin{equation*} f_X(x) = \begin{cases} \frac{4x^2}{5} & \text{ , if } 0 < x \leq 1\\ \alpha(5-2x) & \text{ , if } 1 \leq x < 2\\ \beta x^2 & \text{...
29 views

### Expressing a hazard function with a Cox proportional hazards model

I'm trying to wrap my head around Cox models as well as how to express them in the form of hazard functions when you have both categorical AND numeric covariates. I need some assistance with this ...
9 views

### Can I complete a Moderation Analysis with transformed data?

I am completing a moderation analysis (model 1) in SPSS with the Hayes PROCESS macro, however I had previously applied a logarithmic transformation to my outcome and moderator variables for them to ...
27 views

### Interval width for truncated confidence intervals

I'm conducting a simulation study to compare different methods of constructing CIs for a single proportion. The traditional (Wald/Asymptotic) CI can estimate the upper and lower bounds above 1 and ...
16 views

### Gaussian Process Regression - Draw from posterior

I recently came across Gaussian Process Regressions and started exploring it a bit further since it grabbed my attention. In Rasmussen's book Gaussian Process Regressions for Machine Learning I found ...
8 views

### Class reversal during model training [on hold]

In my model training of an XGBoost model in spark, I noticed that higher probabilities are labelled as negative class, and lower probabilities are named positive class. This is odd since usually we ...
11 views

### Error Propagation of standard devi

I have following problem: I do measurements with technical triplicates and biological dublicates. So I prepare the same sample two times and measure each one three times. This gives me an average ...
6 views

### constrained GAM using bspline

I have presence/absence data for an animal as well as associated environmental covariates, temp, salinity, and oxygen. I'm using a GAM to find the relationship of the response over each covariate. I ...
6 views

### Reporting F-statistic from Prism

I'm a grad student trying to prep an abstract for a poster submission. I've run the data in Prism (2 factor RMANOVA, treatment x time), but I always struggle with how to properly report my stats. ...
23 views

### Interpretation of higher coefficient for group with smaller mean

I am running a fixed effects poisson model with robust standard errors in STATA (xtpqml). The model I run it on has my count data as dependent variable and then as my independent variable I have a ...
10 views

### a sequence of i.i.d random variable property [on hold]

Let $X_1,\dots, X_n$ be i.i.d random variables taking values in $\mathbb R$ with the fact that expectation of $X_1<0$, and variance is finite. Suppose that $\{\eta_n\ge 0\}$ is a sequence such that ...
16 views

### Probability getting lost [on hold]

What is the probability that it is lost in Toronto? In Calgary? In Vancouver?
24 views

### Simulate cointegrated prices and VAR model [on hold]

I am trying to simulate cointegrated stock prices and use a VAR Model to make forecasts. This is the code I wrote so far: ...
54 views

### Is appropriate to use empirical Bayes (EB) in this way?

Background. I have data from a study where participants make a series of judgments (a series of decisions with a binomial outcome, either $y=1$ or $y=0$). I have a model of the underlying decision-...
30 views

### K-Means Unable to Detect Small Clusters

I am just wondering about this issue brought up by our teacher about a drawback of K-means being unable to detect small clusters. It's homework that we should come up with ideas about why this is so ...
17 views

### Orthogonal matrix and inner product [on hold]

Assume that $A$ and $B$ are both orthogonal matrix. The question comes from a proof I read which I attached in the following. \$\begin{align}&\arccos(\max\{|\langle Ax,By\rangle| : \|Ax\|=\|By\|=1\...

15 30 50 per page