(Solved): Determine the minimum sample size required when you want to be \( 95 \% \) confident that the sampl ...

Determine the minimum sample size required when you want to be \( 95 \% \) confident that the sample mean is within one unit of the population mean and \( \sigma=18.2 \). Assume the population is normally distributed. A \( 95 \% \) confidence level requires a sample size of (Round up to the nearest whole number as needed.)