DiagTest3Grp (version 1.6)

var.mu: Variance estimate of the sample estimate for a normal mean parameter

Description

Calculates the variance estimate of a sample estimate for a normal mean parameter.

Usage

var.mu(s, n)

Arguments

s

A numeric value, the sample estimate for normal standard deviation.

n

A numeric value, the sample size of data.

Value

A numeric value, the variance of a sample estimate for a normal mean parameter.

Details

For a sample dataset of size n drawn from a normal distributin $N(\mu,\sigma^2$, denote the sample estimate on the mean parameter and standard deviation parameter as $u$ and s, Then the variance of the sample mean is $Var(u)=s^2/n$.

References

Patel, J.K. and Read, C.B. (1996) Handbook of the Normal Distribution. CRC Press.

Luo, J and Xiong, C. (2012) Youden Index and Associated Optimal Cut-point for Three Ordinal Groups. Communications In Statistics-Simulation and Computation (in press).

See Also

var.sigma

Examples

s <- 1.5
n <- 100
var.mu(s,n)