How to determine sample size ?

How to calculate sample size for unknown population and as well as for known population in epidemiological studies (i.e. descriptive study, cross sectional study etc) ?

03 April 2018 3,842 16 View

Are the impact factor is the authentication of a journal?

Many good journals published since 1960, don't have the impact factor. As this is necessary that a journal have the impact factor will be acceptable and the other will not.

07 August 2015 3,067 1 View

Dear Professors, Researchers are the International Journal of Biosciences is a valid journal for the publication?

The International Journal of Biosciences is published from Bangladesh. Link of journal. http://www.innspub.net/international-journal-of-biosciences-ijb/ Link of Thomson Reuters master journal...

07 August 2015 2,525 1 View

Looking for a collaborator interested in meta-analysis

01 January 1970 9,769 1 View

I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

What are the patterns of human behavior that lead to COVID-19 infections?

Does data from contact tracing help in establishing patterns of behavior and social interactions that lead to infections? There are cases here in the Philippines where patients have no travel...

25 February 2021 9,002 13 View

Can any scholar assist me with an r code for calculating average bias for each parameter of a continuous distribution via simulation?

I want to perform a simulation study to examine the consistency property of parameters of a new distribution through the quantile function. The simulation study will contain many replicates (say...

10 February 2021 180 3 View

Should we analyze or relinquish the clinically confirmed data of COVID-19?

Hello everybody As you know, due to the high cost and time-consuming of laboratory assays, like PCR, for the suspected cases of COVID-19, doing this type of investigation is not possible for all...

06 February 2021 6,122 3 View

Is a Strong correlation between the Moderator variable and the dependent variable an issue for moderation model (model 1) in Hayes PROCESS?

In a typical moderation model with one moderator, is it a problem if the moderator and the dependent variable show a strong correlation (say 0.85)? What if a strong correlation exists between the...

27 January 2021 4,937 4 View

Does the power law behavior can be approximated with Gaussians?

In epidemiology, earthquakes, tokamak disruptions etc., there is possibility of approximations with the sequence of Gaussians and with the appropriate risks ( see my papers in Journal of Fusion...

26 January 2021 5,411 5 View

Any method or procedure of parameters estimation for epidemiological mathematical modeling?

As in the image below, may someone help us on how to estimate the parameters used on epidemiological mathematical modeling described in systems of non linear differential equations? Any possible...

22 January 2021 2,869 3 View

How to analyze non-independent epidemiological data using SPSS?

For my epidemiological data, I have used SPSS and done multiple imputation (MI) to account for the missing information. Now, I am about to analyze my data, but the issue is, that not all...

21 January 2021 3,355 7 View

Do anyone have come across write up on "Technology on De-biasing" ?

De-biasing is a term applied in psychology, behavior, and management decision process. Now it has some connection with technology. Technology is used for leveraging on the reduction of impacts of...

21 January 2021 4,572 2 View

Compare to prevalence before and after covid in population studies?

Dear researchers, I have a prevalence of some diet habit in relatively large narrow population of children 13 years old in 2019 and 2020. Logically they are different population. However, since...

10 January 2021 3,170 9 View