Boxes of cereal are made to weigh on average 15 grams with a standard deviation of 0.5 grams. Using the confidence level 99.73%, what is the upper control limit for the average weight of boxes using a sample size of 36? Note: 1- Do not round intermediate numbers (or keep at least 4 decimal places) 2- Round your final answer to 1 decimal place.

Answer: 15.3 *how to solve*