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.
Last week, scientists netted a 4-pound, 1.5-foot-long goldfish in Lake Tahoe. The scientists also found 15 other goldfish, indicating theyâre probably reproducing in the lake high in the Sierra Nevada.The goldfish were probably aquarium-raised and then dumped by their owners.nother gargantuan goldfish named Goldie made headlines in Britain. Goldieâs owner, an 83-year-old widow, said she bought the fish at a pet store when he was just an inch long. In 2008, Goldie was 15.7 inches long and weighed more than two pounds.