Each sorbate is only adsorbed onto 1 sorbent at a time, in different sorption experiments. The research question is to determine which sorbate was the most sorbed and the fastest sorbed onto which sorbent. Is a test to measure the normality distribution of data needed? Thank you.
You might have a simple factorial design where a two-way anova would work. Or you might need to add a term in the model to account for the "Experiment"s.
The assumptions of the model depend on what model you choose.
For anova type models, the residuals can be examined. I recommend starting with the following slides, taken from Montgomery, Design and Analysis of Experiments. At the following presentation, see slide 8, and then slides 19 - 22.
https://staff.emu.edu.tr/adhammackieh/Documents/courses/ieng581/lecture-notes/ch03.pdf
Hi,
Going by what you have mentioned, you have two questions:
1. Which sorbate (nominal variable) was the most sorbed (scale/continuous).
2. Which sorbet (nominal variable) was the fastest sorbed (scale/continuous) onto which sorbent (nominal variable).
For the first question, you could opt for a one way ANOVA if the data is normally distributed or a Kruskal Wallis test if the data is not normal distributed.
I have a paper where I have used the Kruskal Wallis test that might be helpful. Article Wellbeing of Palliative Care Workers During Covid-19 Pandemi...
I have a video on how to check for normality before choosing ANOVA:
https://www.youtube.com/watch?v=I2S8BA5kbTY
For the second. question, you could opt for a two way ANOVA as suggested by Sal Mangiafico
All the best.
Tan Suet May Amelia, to compare adsorbed concentrations of 4 sorbates by 4 sorbents and determine the most sorbed and fastest sorbed sorbate-sorbent combination, you can use a two-way ANOVA with post hoc tests. This will assess the main effects of sorbate and sorbent, as well as their interaction. Normality tests may not be needed if ANOVA assumptions are met. If normality is violated, consider non-parametric tests. Additionally, analyze time data with appropriate methods (e.g., survival analysis) to determine the fastest sorbed combination. With tools like OriginPro, you can then visualize your data the way i quickly did for you. For more relavant discussion you can ask me on my WA; https://wa.me/+923440907874. Good luck!
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