Question:
We want to obtain a sample to estimate a population mean.
Last updated: 7/18/2022
![We want to obtain a sample to estimate a population mean.](https://media.kunduz.com/media/sug-question/raw/56341773-1658167055.503918.jpeg?h=512)
We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately σ = 1.3. We would like to be 90% confident that the esimate is within 0.5 of the true population mean. How large of a sample size is required?