The results of the 4 independent replications of an (M, L) inventory system for the monthly cost are: [$243.71, $236.36, $235.78, $233.89]
- Compute the mean monthly cost with a 95% confidence interval.
- Using the results of part (a) to estimate mean monthly cost within $7.5, do additional replications needed? If yes how many? If no why?
- Compute the prediction interval and it is limits