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Subject 7. Covariance and Correlation where.
The correlation between two random variables, R i and R j , is defined as:
Alternative notations are corr(R i , R j ) and ρ ij .
Properties of correlation:
<span>Correlation is a number between -1 and +1. A correlation of 0 indicates an absence of any linear (straight-line) relationship between the variables. Increasingly positive correlation indicates an increasingly strong positive lin
last interval [days]
repetition number in this series
scheduled repetition interval
last repetition or drill
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