Accessible population is 108, can we consider that as a weak point for the study?

31 December 2016 8,245 0 View

Chi-square with a convenience sample, is it appropriated?

I have been read that chi-squares are not appropriate when convenience sampling has been applied. is it true?

31 December 2016 4,028 2 View

How i can calculate the overall standar deviation for multi dimensions?

How I can calculate the SD for multi dimensions, if each dimension has a different items?

10 November 2016 5,493 4 View

Is the pilot sample 5% or 10% from the total sample size?

To determine the pilot sample size.is the pilot sample 5% or 10% from the total sample size? and may I have the references??

07 August 2016 6,476 4 View

Instrument Validity through group panel or litrature?

06 July 2016 5,627 1 View

Do i have an ethical approval for online survey?

Do I have an ethical approval for online survey?

03 April 2016 1,778 2 View

Chi-square with unbalanced design?

01 January 1970 2,950 4 View

Is the pilot sample 5% or 10% from the total sample size?

To determine the pilot sample size.is the pilot sample 5% or 10% from the total sample size? and may I have the references??

01 January 1970 905 0 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Would fecal samples stored at -20C for over a year impact metagenomic analysis?

Dear All, I have access to some rodent fecal samples that have been stored at -20C instead of -80C. Anyone have experience with the impact of stowage condition on comparative metagenomic analysis...

01 March 2021 2,512 1 View

No title

01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 3 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

Can random sampling have inclusion criteria?

As random sampling means that everyone in the population have an equal chance to be chosen, can it have inclusion criteria? My research participants have been chosen based on the inclusion...

26 February 2021 6,905 10 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View