The average demand for Mars bars in a vending machine is 20 per week, with a standard deviation of 5. The person responsible for maintaining the vending machine places an order for Mars bars every week and fills the vending machine with that order one week later.

QUESTION 28 2 points Save Answer The average demand for Mars bars in a vending machine is 20 per week, with a standard deviation of 5. The person responsible for maintaining the vending machine places an order for Mars bars every week and fills the vending machine with that order one week later. If they want to ensure that there is not a stock out of Mars bars with 90% probability, they should maintain units of safety stock and a target inventory level of units. (Round each value to the nearest integer, i.e. "1") QUESTION 29 1 points Save Answer A single server model (M/M/1) requires that the rate be larger than the rate. QUESTION 30 1 points Save Answer Which of the following changes would result in longer average wait times? (select all that apply) The average arrival rate per hour increases The average service time per customer increases The number of servers increases The variability in customer arrivals per hour increases