Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 79

ARIMA(0,0,0) model but residuals not white noise

I have a dataset where I am trying to fit an ARIMA model to a stock return - the data set is stationary. I have used the Auto.Arima function to...

Asked on 11/30/2020 by Mathias Schinnerup Hejberg

0 answer

How do we come up with the SVM Kernel giving $n+dchoose d$ feature space?

I was going through the CS229 notes on SVM and Kernel tricks and I came across the following line.More generally the kernel $K(x,z)=(xTz+c)^d$ corresponds to a featuremapping to...

Asked on 11/30/2020 by shiladitya basu

1 answer

Conditional Multivariate Gaussian Identity

I'm trying to verify the form of a multivariate Gaussian provided in a paper I'm reading. It should be pretty elementary. Let $Y=X+varepsilon$ where $Xsim N(0,C)$ and ...

Asked on 11/29/2020 by statian

1 answer

Interpreting infinite odds ratio and confidence interval from Fisher's test

I've performed a two-sided Fisher's exact test on the following data, and the results include Infinity for the upper confidence interval and odds ratio. Are these results erroneous, and if...

Asked on 11/29/2020

2 answer

Log-likelihood of Normal Distribution: Why the term $frac{n}{2}log(2pi sigma^2)$ is not considered in the minimization of SSE?

Reading some books and papers like the great one: ''Bundle Adjustment - A Modern Synthesis'' (page 10), I found that the cost function weigthed Sum of Squared...

Asked on 11/29/2020 by Javier TG

1 answer

Significant change over NxM distributions

I have 100 sets of data, each of which consists of ~ 15 distributions along time, I've attached a figure of 1 of these sets to hopefully clear up what...

Asked on 11/29/2020

0 answer

Random distribution which statistical method

After K-means, I am iterating over many files consists of tables, mostly are 3X3. Some of them with "0" elements inside cells but most of them aren't. I read that...

Asked on 11/29/2020 by TheUndecided

0 answer

Bayes Optimal Classification Rule

Suppose that $Y∈ {0,1}$ and $P(Y=1) = 1/2$. The distribution of $X|Y= 0$ is discrete and is specified by $$P(X= 1|Y= 0)...

Asked on 11/28/2020 by John

1 answer

Calculate confidence interval over Relative Prediction Error

I am trying to understand the concept of the confidence interval, but I get confused with t-test, p-values, standard deviation, and quantiles. My problem is the following: I created a...

Asked on 11/28/2020 by xeon123

1 answer

What could be a good way to interpret this neurophysiological data?

We are looking at different combinations of neurophysiological tests, and trying to find out which combinations of variables are best suited for clinical use (diagnosing diabetic polyneuropathy). To combine the...

Asked on 11/28/2020 by Øystein Dunker

0 answer

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