How do I materialize cyclical phenomena?

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

If we are using snowball sampling technique, how do we justify the true representativeness of the sample statistically? is there any statistical test?

Are there any statistical methods to justify your sampling technique using SPSS or AMOS?

05 August 2024 9,153 4 View

How to report results of Generalised Linear Mixed Models in a journal article?

Hi everyone, If you have written or come across any papers where Generalised Linear Mixed Models are used to examine intervention (e.g., in mental health) efficacy, could you please share the...

04 August 2024 4,130 4 View

What is the best sampling strategy?

I am conducting a qualitative study that uses interviews to investigate the perceptions of teachers about a particular leadership practice and I am focusing on 3 schools which have a total number...

01 August 2024 8,457 10 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Which statistical test should we use?

N=6 Comparing pre and post test likert scale responses. Participants are mix of practicing & preservice teachers.

30 July 2024 7,233 4 View

Is factor analysis with quantitative variables possible?

Good morning, I would like to conduct a factor analysis for my work at the municipal level on a panel datae with variables such as income per capita, unmployement rate, percentage employed in a...

25 July 2024 5,104 4 View

Is it possible to do transient simulation in HFSS in presence of magnetic biasing?

I have designed magnetic material with different biasing conditions in HFSS. Now I want to give an RF AC signal and do a transient simulation in HFSS. Is it possible to do in HFSS? Please help me...

24 July 2024 9,319 5 View

ANCOVA for between-subject design?

Hi, I will run an experiment where reaction time will be the dependent variable, tested in 2 conditions (with the same participants). I want to control for a confounding variable (individual...

20 July 2024 1,943 1 View

I am working on III-V based tandem solar cells.Can anyone explain that solar cells work under forward or reverse biased conditions?

I want to know that n-doped side of solar cell is connected with positive or negative electrode.

20 July 2024 1,348 2 View

Darren C Greenwood

Is this what you mean?

A M Stolwijk, H Straatman, G A Zielhuis. Studying seasonality by using sine and cosine

functions in regression analysis. Epidemiol Community Health 1999;53:235–238.

C. F. Christiansen, L. Pedersen, H. T. Sørensen, K. J. Rothman. Methods to assess seasonal effects in epidemiological studies of infectious diseases—exemplified by application to the occurrence of meningococcal disease. Clin Microbiol Infect 2012; 18:963–969.

James Leigh

the main methods are spectral analysis *frequency domain) and autoregression, moving average and combined autoregression moving average (time domain) modelling.

Lapo Mughini-Gras

If you are interested in studying seasonality (periodic oscillations) in your data, you can use regression modelling with a parameter per each season, but perhaps it would be more elegant to use sinusoidal functions (harmonic regression).