how to calculate correlation what is the limitation of the correlation approach? how to calculate correlation do random variables affect correlations how can we predict correlation between two random variables is correlation still based on one random variable can you find correlation between random variables? what would happen if I only take one individual and measured his weight and height in many points time? can a random variable be a correlation? can you find correlation between two random variables? can correlation be based on only one random variable how to predict a correlation what is the limitation of an approach that uses only one random variable? does correlation based on random variables what is the limit of correlation based on random sampling what is the limit of an approach that is based on one individual can a random variable be a correlational variable what is the limit of estimating correlation based on a random sample of individuals? what is the limitation of an individual sample can random variables be correlated?