# Question

Suppose that in a sampling survey to estimate the population variance, the biased estimator was used instead of the unbiased one. The sample size used was n = 100, and the estimate obtained was 1,287. Can you find the value of the unbiased estimate of the population variance?

## Answer to relevant Questions

Suppose that you have two biased estimators of the same population parameter. Estimator A has a bias equal to 1/n (that is, the mean of the estimator is 1/n unit away from the parameter it estimates), where n is the sample ...Suppose you are sampling from a population with mean µ = 1,065 and standard deviation σ = 500. The sample size is n = 100. What are the expected value and the variance of the sample mean µ? In problem 5-41, what is the probability that the sample mean will be at least 1,000? Do you need to use the central limit theorem to answer this question? Explain. In problem 5-41 Suppose you are sampling from a population ...Is the sample median a biased estimator of the population mean? Why do we usually prefer the sample mean to the sample median as an estimator for the population mean? If we use the sample median, what must we assume about ...Suppose that you are given a new sample statistic to serve as an estimator of some population parameter. You are unable to assume any theoretical results such as the central limit theorem. Discuss how you would empirically ...Post your question

0