Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 16

What does the Hedges g mean in this meta-analysis?

I am looking at the outcome scores of the WOMAC for the three studies included in the meta analysis, but I am having a hard time figuring...

Asked on 12/15/2021 by CharlieCal

1 answer

Using Regression Trees for Univariate Time Series Data

I have a monthly time series (105 observations) including trend and seasonality and want to forecast the numeric values. I initially tested with the Box-Jenkins approach and other univariate models...

Asked on 12/15/2021

2 answer

too much levels in the categorical variable in a GLM

I have 187 observations, the categorical variable is a predictor. My response variable is CPUE (catch per unit of effort). My goal is to know which of these variables (temperature,...

Asked on 12/15/2021

1 answer

What classifier could predict spam/ham labels for SMS messages better than Naive Bayes?

I have 7000 SMS messages, 6000 ham, 1000 spam. Typical messages are:Ham: Yo, any way we could pick something up tonight?Spam: Great News! Call FREEFONE 08006344447 to claim your...

Asked on 12/15/2021

1 answer

ar() in R and Matlab give different results for same dataset

I have a Matlab script that performs some autoregressions and am trying to replicate it in R, but can't get them to match. So as a MWE, I'm trying to...

Asked on 12/15/2021

0 answer

Interpreting PCA results of first two components

I don't like the looks of my PCA graph here. PCA coordinates should be uncorrelated, yet the variance between the coordinates of the second component increases as the first component...

Asked on 12/15/2021 by paulgr

1 answer

p-value to Z-statistic for a KS test

Say you had a two tailed normal distribution A for some dataset, and you then measured the probability that some set of data points B were drawn from A, using...

Asked on 12/15/2021 by user8188120

0 answer

baisc question about fit of GLS in R

Wondered if anyone could help.I've fit the below model in R using GLS from the nlme package.m2_p1q2 <- gls(log(ratio) ~ level + levellag + ...

Asked on 12/15/2021 by user284031

1 answer

Probability that automated process is 95% accurate given n sucesses

I have trained a robot to flip an (unbiased) coin and get heads every time. Each flip is with a new coin (more on that shortly). How many successes does...

Asked on 12/15/2021 by mbyvcm

1 answer

When picking k from a population n, with replacement, how do I determine the optimal n where all of k will be unique?

Let say I pick k number of particles from a population n, with replacement, and the population n is derived from picking i number of particles from a pool of...

Asked on 12/15/2021 by MikkeyWilks

0 answer

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