The phrase "a correlation is made" is correct and usable in written English.
It can be used in contexts where you are discussing the establishment of a relationship or connection between two or more variables or factors.
Example: "In the study, a correlation is made between increased physical activity and improved mental health outcomes."
Alternatives: "a correlation is established" or "a correlation is identified."
A correlation is made between the degree of transesterification and the lowering of the glass transition.
A correlation is made between them, taking into account turbulent diffusion of the gas phase.
In this study a correlation is made between key pervious concrete properties such as the porosity, permeability, compressive and tensile strength versus the cement paste thickness.
A correlation is made between lattice oxygen instability and activity of the catalysts, which indicates involvement of the lattice oxygen in the mechanism.
A correlation is made between final NP properties and laser-induced processes mainly related to phase explosion generating liquid droplets that cool during flight or on the substrate.
As, a correlation is made the probability of identical or exceeding certain electricity demand thresholds can be determined [4].
A correlation was made for the soft, hard segment and chain extender structure to the phase mixing phenomenon during cure.
A correlation was made between the sample fatigue life and the size of the microstructural defect which initiated the fatigue crack.
In this study, a correlation was made between wind velocity and morphological parameters such as width of buildings and widths of the street that separates buildings, building height and building density.
In addition to comparing among HPC performance, a correlation was made between commonly measured parameters such as strength, shrinkage, and modulus of elasticity with cracking onset obtained from ring tests.
A correlation was made between the band pattern and the protein production profile.
