On 21 Jan 2002 08:55:21 -0800, [EMAIL PROTECTED] (Scheltema,
Karen) wrote:
I have 2 independent samples and the standard errors and n's associated with
each of them. If a and b are constants, what is the formula for the 95%
confidence interval for
(a(Xbar1)+b(xbar2))?
Var(A+B) = Var(A)
Scheltema, Karen wrote:
I have 2 independent samples and the standard errors and n's associated with
each of them. If a and b are constants, what is the formula for the 95%
confidence interval for
(a(Xbar1)+b(xbar2))?
Are the sample sizes big enough that you'd be prepared to use the CLT?
