consider the unbias estimaters mu1hat = 1/2 xbar + 1/2 ybar. and mu2hates = 1/3 xbar + 2/3 ybar. calculate the variance of mu1hat and mu2hats
i have never herd this one it is nt in my sylabus
covarance is also not in my sylabus and i dont know any resource i cn find to find this one out.. i looked on many website and i not find ...
also there is not muhat 1 and muhat 2. .. it is muonehat and mutwo hats. like U '',