In statistics, the coefficient of determination R2 is the proportion of variability in a data set that is accounted for by a statistical model. In this definition, the term variability is defined as the sum of squares. There are equivalent expressions for R2 based on an analysis of variance decomposition.
On average, an ostrich egg weighs about 1.4 Kg (3.1 pounds). On average, an ostrich egg weighs about 1.4 Kg (3.1 pounds).
An ostrich hen lays 7 to 10 eggs at a time, but her large body can easily cover dozens more. Communal laying has advantages for an ostrich flock: more eggs successfully hatch overall in a communal nest than if each female ostrich had her own nest to incubate and protect.