Halving the Standard Error
Your estimate of a population mean from a random sample of size n has standard error SE. How large a sample do you need to cut the standard error in half?
Related problems & prerequisites
Worth solving first
- How Many Classrooms 4.0/10
- How Many Per Arm 3.0/10
Source: Standard standard-error exercise from introductory statistics texts. Statement written for AxiomIQ.