s2 {surveyplanning}

Population variance

Description

The function to estimate population variance S^2.

Usage

s2(y, w = NULL)

Arguments

y

Study variable.

w

Survey weight (optional). If not defined, it is assumed to be 1 for each element.

Value

Population variance S^2 or the estimate of population variance s^2.

Details

If w is not defined, the result is equal to the result of the function var.

Examples

s2(1:10)
s2(1:10, rep(1:2, each = 5))
all.equal(s2(1:10), var(1:10))