Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 48

Can I use different data types in a general linear mixed effects model?

I've become quite familiar with linear mixed effects models but I'm not very certain about their General counterparts. I have a data set which looks like the following: ...

Asked on 11/02/2021 by NickB

1 answer

What is a rigorous, mathematical way to obtain the shortest confidence interval given a confidence level?

After reading the great answer for this question by @Ben, I am a bit confused by the part " set the relative tail sizes as a control variable, and...

Asked on 11/02/2021

4 answer

How to calculate test error

I'm reading about test/generalization error in Hastie et al.'s Elements of Statistical Learning (2nd ed). In section 7.4, it is written that given a training set $mathcal{T} = {(x_1,...

Asked on 11/02/2021

1 answer

Paired vs independent t-test for A/B test with underlying trends

There is a metric which has a natural cyclic pattern. We want to measure the effect on this metric through a A/B test. Examples:Metric is daily revenue of ice-cream trucks...

Asked on 11/02/2021 by BiGYaN

2 answer

whats the best statistical method to analyse and compare four groups of intervention with follow up?

I have recently conducted an experiment to compare the efficacy of 3 treatments and I had a whait-list group too.I had three interventions and a I wanted to compare...

Asked on 11/02/2021 by amir etemadi

1 answer

Are all Machine Learning algorithms divided into Classification and Regression, not just supervised learning?

I'm newbie in AI I know that Supervised Learning algorithms are divided into Classification and Regression algorithms. But is that true of all machine learning algorithms, not just Supervised Learning?...

Asked on 11/02/2021 by Soulduck

4 answer

Multivariate time series forecasting with trend and seasonality

I'm working on a dataset which has city and product level sales for the past 3 years - on a daily level. My objective is to forecast the sales for...

Asked on 11/02/2021 by Anish Raina

0 answer

On the difference between the main effect in a one-factor and a two-factor regression

Consider a linear regression (based on least squares) on two predictors including an interaction term: $$Y=(b_0+b_1X_1)+(b_2+b_3X_1)X_2$$ $b_2$ here corresponds to the conditional effect of $X_2$ when ...

Asked on 11/02/2021 by Arnaud Mortier

2 answer

Is there a joint test of model coefficients, effectively testing for main and interaction effects in quantile linear mixed model?

I am just reading this paper: Linear Quantile Mixed Models: The lqmm Packagefor Laplace Quantile Regression. Let us assume I have a repeated observation experiment, where...

Asked on 11/02/2021 by Katikarnata

0 answer

Linear trend with time-series does not fit the data perfectly. Is that OK?

I am new to a time-series model. I try to improve my knowledge by practising. I understand the stationary for the time-series model. I read many papers and tutorials regarding...

Asked on 11/02/2021

2 answer

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