5. Consider a population of five weights identical in appearance but weighing 1, 3, 5, 7 and 9 ounces. The variance for the population (\( \sigma^2 \)) is ________. (5%) Sampling without replacement from the above population with a sample size of 2 produces ten possible samples. Using the ten sample mean values to calculate the variance of \( \bar{X} \), it is ________. (5%) Why is this value not the same as \( \sigma^2/n \)? ________ (5%)