Online tool for chi2 difference testing for WRMR?

More Gert Lang's questions See All

Can formaldehyd-fixed gelatin be melt?

I am puzzled about the properties of gelatin, when used for tissue-embedding. Hard gelatin can be melt again by temperatures about 40°C. Formalin-fixed gelatin is like crosslinked protein and...

07 August 2024 1,686 1 View

How to correctly specify a multi-group latent change score model in Mplus?

Hi all, I face problems in specifying the correct Mplus input for running a multi-group comparison of a latent change score (LCS) model, including a PRE and POST measure with 3 indicators for...

21 May 2024 4,578 1 View

Does anyone know this kind of cell culture contamination?

First, there are bubbles with small black dots inside visible. The next day those bubbles disappear and the rod-like structures are present in our cell culture, which are fast growing but not...

26 June 2023 4,139 1 View

Do M-CSF bone marrow-derived macrophages express F4/80?

F4/80 is used as a marker to identify murine tissue/peritoneal macrophages. In our working groop we isolate monocytes from rat tibia and femur and differentiate them subsequently into bone...

13 March 2023 8,339 3 View

How to get an estimation of independent variables in SEM?

Hi SEM and Mplus community! I think this question is rather basic but unfortunately I can not find a solution to this issue: In Mplus 8 I estimated a linear second order growth curve model with...

05 March 2023 2,698 3 View

How do I choose the correct test of significance for experimental data?

I have 5 biological samples, each tested at two dilutions (4 technical replicates each). I am using a standard curve to convert the fluorescence units into micrograms of protein and normalizing by...

25 April 2022 2,474 7 View

Are there any good bi-directional DC power supply as battery simulator?

Hey, I'm looking for some precise (µV/µA) and fast (

10 October 2021 2,787 3 View

What could be the reason for a poor primary renal fibroblast cell growth ?

Hello all, I'm trying to isolate and expand human primary renal fibroblasts from nephrectomy samples using an explantation technique. This technique has already been used successfully in my lab...

19 September 2021 4,766 5 View

Flow cytometry marker for human keratinocytes?

I would like to use flow cytometry to characterize the cells of a Single Cell solution of human skin samples. Does anyone have a tip which marker is suitable for keratinocytes? Thanks!!

12 September 2021 5,112 2 View

Is the student sample accepted in socioeconomic or consumer behavior-related studies?

The student sample can have been questioned the validity and generalizability and threatens the external validity due to not representing the general population or "real people" and unique...

09 September 2021 2,447 2 View

How much total RNA concentration to be extracted from sorted plasma cells from bone marrow of C57BL/6 mice for RT-PCR ?

i have sorted anti-NP specific plasma cells from bone marrow of C57BL/6 mice at certain times after immunization with variable counts and isolated total RNA using TRIZOL method for RT-PCR using...

05 August 2024 8,835 1 View

Is CFI / TLI = 1 okay in Mplus?

Hi there, I did a CFA to 10 items on 2 latent variables. The model fit is too good and I've never seen it before. CFI / TLI = 1, RMSEA = 0. Is it okay, if everything else was done properly?...

24 July 2024 5,454 7 View

Why my gel electrophoresis has smearing?

Greetings. I’m currently running a nested pcr for giardia. My mastermix comprised of 3mM Mgcl2, 5unit of taq polymerase, 0.2uM of forward and reverse primers each respectively and 0.2mM of dNtp...

22 July 2024 9,761 5 View

How to Select the most suitable machine learning algorithm depending on the characteristics of the given dataset ?

I'm working on a project that involves analyzing a new dataset, and I'm at the stage of selecting the most appropriate machine learning algorithm. The dataset consists of both numerical and...

22 July 2024 6,097 7 View

How to test multivariate outlier in STATA?

Hey all, I need help testing for multivariate outliers using STATA for my master thesis. The literature recommends the Minimum Covariance Determinant (MCD) (Verardi & Dehon, 2010). I found the...

22 July 2024 8,821 2 View

Any homemade protocol to extract genomic DNA from leaf litter?

We are trying to extract DNA from ant nests to amplify the 16S gene, but apparently, the extraction allows the passage of PCR inhibitors. Thank you for your comments

15 July 2024 9,314 2 View

Why there is glow in the well after nested PCR?

Dear Researcher, I have used nested PCR to increase the specificity of Tetra Arms. Previously, I obtained results for another SNP using the same reaction conditions, and separate reactions...

14 July 2024 430 4 View

Why maximum likelihood approach over sample variance?

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25 June 2024 3,921 3 View

I want to do a CFA in AMOS,I have 10 questions in a questinaire which are in 3 factors .Amos does not run the CFA at all.I can not understand why?

and shows no error or explanation about the reason .any one can help me?I think I am doing each step correctly

20 June 2024 3,295 2 View

Can Mplus handle a Moderated mediation analysis with multiple IV and DVs?

I want to run a moderated mediated path analysis in Mplus. The model is based similar to PROCESS model 35 expect I want to run it with 6 IVS and 2 DVs simultaneously. I have been searching but...

18 June 2024 3,592 3 View

Christian Geiser

Do you mean WLSMV estimation? If so, then you may be able to use the difftest option in Mplus which automates chi-square difference testing. This feature is described, for example, on the following website:

https://stats.oarc.ucla.edu/mplus/faq/how-can-i-compute-a-chi-squared-test-for-nested-models-with-the-mlmv-or-wlsmv-estimators-difftest/

Gert Lang

Yes sure, I meant WLSMV not WRMR. Thanks for providing the URL.