Covariance measures the linear relationship between two variables. The covariance is similar to the correlation between two variables, however, they differ in the following ways: Correlation coefficients are standardized. Thus, a perfect linear relationship results in a coefficient of 1. The correlation measures both the strength and direction of the linear relationship between two variables.
The Largest True Goldfish Ever Caught. The largest true goldfish on record was measured at 5lbs (2.27 kilograms) and was caught by a 16 year old schoolboy in the UK. This blown-up goldfish was evidently a pet before it ended up into a lake.
5lb goldfish caught in Dorset could be biggest in Britain. The future's bright for schoolboy angler Nick Richards after he reeled in an enormous 5lb goldfish. Sixteen-year-old Nick Richards, from Camberley, Surrey, was fishing for carp in a lake in Poole, Dorset, when he noticed a flash of orange under the water.