Estimate the mean and variance given a sample.

Free CAS MAS-I (Modern Actuarial Statistics I) lesson in Statistics. 11 min read, ~1,598 words.

Sample mean is unbiased:, with variance. Sample variance. The denominator is what makes. Computational shortcut: avoids recomputing each deviation. Standard error of the mean:. Use this, not, in confidence intervals for. Bessel's correction matters. Dividing by underestimates by a factor of. Sample standard deviation is biased downward for by Jensen's...