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Questions related from Pauline Delhez
I want to see if there is a significant difference in BHB concentration between 5 age categories in some farm animals. Farm should be a random effect in the model. The issue is that BHB...
22 June 2023 5,098 0 View
What is the sample size calculation for a discrete outcome (count variable)? For example, I want to design a trial with a placebo and a treatment. Alpha is 0.05 and power 0.8. The outcome is the...
28 March 2023 8,147 11 View
How to calculate the appropriate sample size for the development of a new clinical test? The test would either be a quantitative test if the accuracy is good enough (i.e., test would predict a...
30 January 2023 1,571 4 View
Are there any scientific journals in the field of ruminants/animals/agriculture/veterinary sciences with open access and with no Article Processing Charge for authors (free)?
29 November 2022 7,589 2 View
How to estimate the minimum number of subjects that should be enrolled for phase 1 of a clinical trial? The objective of phase 1 is to test for the safety, side effects, dose etc. I know we...
14 October 2022 5,320 5 View
I want to calculate the relationship between 2 variables: one variable has continuous values (see x variable on the plot and in the example table) whereas the other has an upper class for values >...
11 January 2021 667 11 View
I would like to assess the synchrony between two time-series (i.e. do they have the same evolution over time?). I am using Python. Examples of the time series are in the files attached. The...
10 November 2020 6,085 6 View
I have a dataset including spectra collected with a handled NIR spectrometer (SCiO) over several months. I observe a baseline drift that is consistent with the evolution of the measurement date....
19 October 2020 9,260 3 View
I am using the slack-based measure (SBM) of efficiency (additive DEA) to assess the eco-efficiency of farms. Efficiency scores range from 0 to 1. At a second stage, I would like to examine...
10 December 2019 183 5 View
I am using Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA) to measure the eco-efficiency of dairy farms. I would like to use the "percentage of grasslands in the...
23 October 2019 9,212 5 View
I am using Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA) to measure the eco-efficiency of dairy farms. I would like to use the quantity of chemical fertilizers as an...
23 October 2019 5,997 6 View
I want to know if there is a significant difference in a blood biomarker concentration between 2 populations (population 1 = healthy individuals - population 2 = sick individuals). I need to...
01 January 1970 3,183 2 View
