Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 80

The definition of natural cubic splines for regression

I am learning about splines from the book "The Elements ofStatistical Learning Data Mining, Inference, and Prediction" by Hastie et al. I found on page 145 that Natural cubic...

Asked on 11/28/2020 by Durin

2 answer

Why do we need to emphasize sufficient statistics in generalized linear models?

In generalized linear models, $$p(y;eta)=b(y)exp(eta^TT(y)-a(eta)) \ eta=theta^T x$$we assume $x$ is the input variable and $y$ is the output and our target is to get the...

Asked on 11/27/2020 by tranquil.coder

0 answer

How to impose restrictions on a random matrix via its prior distribution?

I am reading the paper Factor analysis and outliers: A Bayesian approach. The author starts with a factor analysis model given by$${bf y}_i = {bf...

Asked on 11/27/2020 by SOULed_Outt

1 answer

Bounds for the expectation of the max

Consider the following expected value$$E(max{a_1+epsilon_1, a_2+epsilon_2,...,a_n+epsilon_n})$$where the expectation is taken with respect to the random variables $(epsilon_1,...,epsilon_n)$ and $a_1,...,a_n$ are real numbers. Can...

Asked on 11/27/2020 by user3285148

1 answer

In OLS, when absolute value of the coefficient of a independent variable is large, does it mean this independent variable is more important?

Assume there is no multicollinearity and each feature in data X has been standardized to zero mean and unit variance....

Asked on 11/26/2020 by duke yue

0 answer

How to estimate click through rate lift for a ranking model?

Suppose I want to build a ranking model for product search in an eCommerce site. I can use a pointwise or pairwise approach to build a ranking model based on...

Asked on 11/26/2020 by etang

0 answer

Comparing percentages based on likert scale by year

I'm reviewing an analysis someone else has done on some Likert scale data. They've assigned each point on the scale 1-5 (1 = bad, 2 = poor etc.), found the...

Asked on 11/26/2020 by Chris Beeley

1 answer

The probability that the minimum of a multivariate Gaussian exceeds zero

Suppose $X sim mathcal N_n(text{diag}(Sigma), sigma^2 Sigma)$ where $Sigma$ may be allowed to be low rank, and let $Y = min_i X_i$. What can be said about...

Asked on 11/26/2020 by jld

0 answer

Cohen's Kappa for more than two categories

I have data set of teacher's evaluation rated by 4 different raters. The teacher's are evaluated for 13 different categories for example (Interaction with students, lesson delivery etc). All of...

Asked on 11/25/2020 by Asra Khalid

1 answer

How can I forecast with multiple time series sampled at different frequencies?

I am attempting to build a time series model that can predict order volumes for a single firm in the trucking industry. I have time series data on the firm's...

Asked on 11/25/2020 by dkent

1 answer

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