Statistics

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Questions related to Statistics

Why raman band width changes due to swift heavy ion irradiation ??

In Oxide materials thin films, i looking for the answer: Why raman band width changes due to swift heavy ion irradiation ?? Kindly reply with proper reference

08 July 2021 9,544 2 View

How can i interpret an interaction with a dummy variable?

In my research, I've made a following equation (with a demographic dummy variable Czech = 1, Dutch = 0): DV * Czech = b0 + b1*Czech + b2*Czech ... b10*Czech. I can simply interpret the b1...b2...

03 July 2021 9,257 11 View

How do you calculate Odds ratio when multiple risk factors exist for a single patient?

Dear fellow researchers, As a part of my study, I am calculating the odds ratio in Head and Neck cancer patients. At first, I calculated the odds ratio separately for each risk factor (smoking,...

02 July 2021 4,375 5 View

Is CFA mandatory when using a validated scale in a different context/area of use?

Hi, I recently used a validated scale to measure self efficacy on technology use of maritime instructors. The scale was originally developed for measuring self efficacy for a generic instructor....

01 July 2021 9,725 7 View

Acid Digestion Procedure for 47mm PTFE Filter? Can we use same solution For HPLCor ToC analysis?

I want to analyze Metals collected on 47mm PTFE Filter.

01 July 2021 7,732 1 View

How do we prove that the dataset has imbalanced data?

A dataset has imbalanced dataset. How do we prove this? Is there any statistical or mathematical or visual representation approaches?

28 June 2021 9,861 11 View

Which design of experiment is appropriate for me when the optimum response happens at the boundary of a factor?

I have two factors ( X1 and X2) and a response (Y). I want to find the values for X1 and X2 to obtain maximum Y. I have done some tests to have a view of response in terms of X1 and X2. I fixed...

28 June 2021 9,828 3 View

How to convert aerosols number concentration from counts/liter to dN/dlogDp (1/cm3)?

I am trying to compare the performance of several aerosols measurement techniques including the optical particles counter principles and photometer. The GRIMM records concentration in counts/liter...

28 June 2021 1,266 1 View

How to control an effect for different variables in an ordinal logistic regression?

Hello, I’m analyzing how multiple emojis change the perception of messages. In the questionnaire, the participants had to rate neutral sentences and the same neutral sentences enriched with one...

25 June 2021 1,090 5 View

Summing means and calculating a total SD?

I am wanting to sum four means I have (food intake measured in Kcal) as I need to total food intake vs the Kcal for each type of food. I have the M and SD of Kcal for each food type for both the...

23 June 2021 5,967 5 View

Do we need to use any significance level correction when comparing different samples using the Wilcoxon Rank Sum test?

Assuming we have six vectors: A, B, C, A', B', and C'. A, B, and C are the outputs of method X. A', B', and C' are the outputs of method Y. These methods are iterative, and the outputs are...

22 June 2021 3,917 3 View

Can Mendeley add some references from previously added list in another place of the document without going to the library again?

Suppose I have added 20 references from the Mendeley library into the document as usual in a certain place. How can I add a reference or more of the references in a different place from the...

19 June 2021 7,844 4 View

Is it better to perform factor analysis or do a simple mean out of the items?

For my thesis research in SPSS, I asked respondents to evaluate a company based on five items - affordability, quality, sustainability, trendiness, ethical behavior (5-point Likert scale, where...

17 June 2021 3,568 5 View

SILAC proteomics with micro-LC and Micromass QTof?

Hello there, I know that shotgun proteomics relies on high-resolution instruments (i.e. Orbitrap and New QTof systems) with nano-LC flow and nano-ESI mostly, however I only have a reach to a...

09 June 2021 2,408 3 View

Is there a relationship between omega squared and omega coefficient?

I am not sure whether omega squared (the measure of effect size, and a less biased alternative to the Eta Squared) is somehow related with McDonald's omega coefficient (the measure of internal...

06 June 2021 3,563 3 View

Likert scale - forming groups using cluster analysis?

Even if there are some posts on this, unfortunately I still haven't found the answer to my problem (as I am also quite new to this field). I have a datasat with 1700 respondents. In this data set...

05 June 2021 1,432 4 View

Can we add odds ratios?

Im working on a meta analysis and in analysis i have multiple adjusted odds ratio for a drug's efficacy in a disease. the odds ratios are drugs efficacy in 6 months and another is of drug's...

30 May 2021 5,293 3 View

What windows system is appropriate to run mixsiar Gui without problems ?

> library(RGtk2) Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared object 'C:/Users/TOSHIBA/Documents/R/win-library/4.0/RGtk2/libs/x64/RGtk2.dll':...

27 May 2021 4,709 1 View

Where can I find a good Z-Score table?

Dear all, I hope you are keeping well. I used calculated z scores to compare the differences between groups of different normal distributions. My scores are both positive and negative (please...

26 May 2021 7,215 8 View

Can someone share references for the k-sample test for differences on proportions?

I am using the R function of prop_test (from stats package) to test whether the proportions in k samples (k=5) are identical. However, the documentation does not provide references for the...

14 May 2021 7,227 5 View

How can I analyze a path analysis with a bidirectional relationship (X<--> C) in Mplus?

This is my input in mplus. When I run the model, the program did not work and give output as usual. It calculated the model but not give the results of specific indirect effects. I also do not...

12 May 2021 9,053 4 View

Order of plots in subgroup analysis in Stata?

Hi, I am doing a subgroup meta analysis and want to arrange my plots in descending order. Stata by default arranges the subgroups in ascending order. Could anyone please guide me that how can I...

07 May 2021 7,416 3 View

Can you make valid research, when the experimental design does not match the research question?

Hi, I need som second opinions on an issue. I'm in the process of writing my thesis, where I want to explore the effect of social norms (SN) and social identity (SI) on engagement towards active...

05 May 2021 8,334 8 View

What statistical test should I perform?

I'm looking at the effect of the drug on lung function. What test should I perform for pre and post control vs pre and post treatment? Control group had measurements taken before and after...

05 May 2021 4,165 7 View

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