Which of the following best describes a point estimate in the context of statistical estimation?
Question 2
Suppose we have a sample of size 50 from a normal distribution with unknown mean and variance. We want to estimate the population mean. Which estimator is unbiased for the population mean?
Question 3
The bias of an estimator is defined as:
Question 4
A confidence interval for the population mean is constructed as $\bar{X} \pm z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$. Which of the following conditions must hold for this formula to be valid?
Question 5
Which of the following is an example of the bias-variance tradeoff in estimators?
