simple past tense and past participle of correlate
"The scientist analyzed how the two variables were correlated in her study last year."
In plain English: When two things are correlated, they tend to change together so that when one goes up or down, the other usually does too.
"The study shows that stress levels are correlated with poor sleep patterns."
mutually related
"The study found that sleep duration and daytime alertness are correlated, showing they are mutually related in a predictable way."
mutually related in a correlation
"The study found that hours spent studying were correlated with higher test scores, showing a mutual relationship between the two variables."
In plain English: Correlated means two things change together so that when one goes up, the other usually does too.
"The data showed that stress levels and sleep quality were correlated, with less rest leading to higher anxiety."