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.
There are mainly two types of goldfish. They are the egg-shaped body goldfish and the flat body type. The flat body types generally are the hardiest, most competitive, and easiest to care for-thus they are most suited for beginners.Flat body type goldfish include the common, comet, wakin, jikin, and shubunkin goldfish.here are mainly two types of goldfish. They are the egg-shaped body goldfish and the flat body type. The flat body types generally are the hardiest, most competitive, and easiest to care for-thus they are most suited for beginners.