Let be a random sample of size n from a normal distribution , where both , are unknown. Find a minimum value of n to guarantee, with probability , that a % confidence interval for will have length no more than , where is a specified constant.
Let be a random sample of size n from a normal distribution , where both , are unknown. Find a minimum value of n to guarantee, with probability , that a % confidence interval for will have length no more than , where is a specified constant.