# Questions tagged [wald-test]

Hypothesis test based on the approximate normal distribution of the maximum likelihood estimator.

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### How to interpret DESeq results with LRT vs. with Wald's test

I am new to the field of RNA-Seq and wanted to ask for advice concerning the proper use of the two DESeq() test options (LRT vs. Wald test). Briefly, my ...
1 vote
29 views

### In what scenarios can we use Wald confidence intervals

In my stats course we derived Wald confidence intervals using properties such as asymptotic normality of the maximum likelihood estimator. This asymptotic normality relies on a statistical model being ...
50 views

### Does the "log-likelihood" measure cover all details about model fit, like covariance structure, adjustments, robust variance estimator, etc?

Just a general statistical question: when any statistical software returns log-likelihood of some model, does it account for all details in it? For example, when we employ generalized least square ...
55 views

### Can be any example of testing contrasts using Wald's approach reproduced with Likelihood Ratio testing?

For illustration I will use R, but the question is general statistical question, totally not R related. Assume I have a numerical variable and categorical variable with 3 levels, like A, B and C, for ...
51 views

### calculate effect size from regression table

I am working on power analysis for a project. I want to benchmark effect size from another study. How can I find the effect size (Cohen's d) just by looking at the regression table below? For instance,...
1 vote
21 views

### Hypothesis test for treatment with opposite signed effects across subgroups

Imagine a treatment that, if it has an effect, is likely to affect two groups in opposite directions. As a concrete example, suppose I am testing the effect of a Republican politician endorsing a ...
1 vote
147 views

### Comparing cross-lagged coefficients in Mplus (Wald chi-sq test)

I'm running a cross-lagged panel model analysis in Mplus. The cross-lagged path coefficients were constrained to be equal across time. Now, I'd like to test if the cross-lagged path from MSC to MA and ...
1 vote
33 views

### How to compare 2 estimates from a model fitted by MLE when the covariance of the estimate can't be always estimated?

I have one model, that I fit using MLE. In order to feel what could be a good initial guess for the fitting process, I try different arbitrary smartly chosen initial guess (not random) and report the ...
18 views

### Statistical difference per group

I am calculating elasticities per income quintiles. I have 10,000 observations of elasticities calculated for each quintile, so a dataset of 5*10,000. I would like to test whether the elasticities are ...
108 views

### svychisq with statistic="Chisq" vs. statistic="adjWald"

I'd like to run analyses using Rao-Scott Chi-squared test using svychisq to account for survey weights. It seems that statistic="Chisq" gives the Rao-Scott version, however, now that I'm ...
287 views

### What is the difference between z-value and the Wald statistic in the summary function of the Cox Proportional Hazards model of the “survival” package?

When I run the code posted at the bottom (using the summary() function of the R survival package, I get the output shown ...