A paper company sells paper that is supposed to have a weight of 75.0 g/m2. In a quality inspection, the weights of 30 random samples of paper are measured. The sample mean of these weights is x- = 74.4 g/m2, with a sample standard deviation of 2.095 g/m2.
Provide (unbiased) point estimators for the mean, variance, and standard deviation of the weight.