If vendor lead time is 4 days and the number of days between reviews is 6. Which of the following is the standard deviation of demand over the review and lead time if the standard deviation of daily demand is 10? Use fixed-time period model.Group of answer choices

55. A small company records the number of online orders it receives each day for a week (Monday to Sunday). The numbers of orders are as ps: follows: 10, 12, 15, 8, 20, 15, and 18. What is the standard deviation of the number of orders? A. 5.87 B. 4.67 C. 4.28 D. 1.36

Question 1: Lead Time Demand and Safety Stock 4 points If demand for an item is normally distributed and the lead time is 2 days, then we plan for demand during the lead time to be twice the average daily demand and carry 2 standard deviations worth of safety stock inventory. Please answer 'True' or 'False'.  Locally stored answer:  Question 2: P-Model vs Q-Model 4 points The fixed-time period inventory system has a smaller average inventory than the fixed-order quantity system because it must also protect against stockouts during the review period when inventory is checked. Please answer 'True' or 'False'.  Locally stored answer:  Question 3: Mean Lead Time Demand 8 points A company has recorded the last five days of daily demand on their only product. Those values are 148, 125, 125, 123, and 136. The time from when an order is placed to when it arrives at the company from its vendor is 2 days. Assuming the basic fixed-order quantity inventory model fits this situation and no safety stock is needed, what is the reorder point (ROP)?  Locally stored answer:  Question 4: Order Quantity in P-Model 4 points Which of the following is not required to compute the order quantity using the fixed-time period model with safety stock? * A) Forecast of average daily demand. * B) Safety stock. * C) Inventory currently on hand. * D) Ordering cost. * E) Lead time in days.

A stock has had returns of 14%, 27%, 18%, and 5% for the past four years. Calculate the standard deviation of the returns.Group of answer choices9.1%8.2%8.8%6.4%

Question 5: P-Model 6 points Using the fixed-time period inventory model, and given an average daily demand of 171 units with standard deviation 7, 10 days between inventory reviews, 3 days for lead time, 73 units of inventory on hand, a z-score of 1.96, what is the order quantity? Please round up to a whole number.  Locally stored answer:  Question 6: Safety Stock A local service station is open 7 days per week, 365 days per year. Sales of 10W40 grade premium oil average 19 cans per day. Inventory holding costs are $2 per can per year. Ordering costs are $10 per order. Lead time is 2 weeks. Backorders are not practical -- the motorist drives away. Part a: 4 points Based on these data, choose the appropriate inventory model and calculate the economic order quantity. Please round to a whole number.  Locally stored answer:  The boss is concerned about this model because demand really varies. The standard deviation of demand was determined from a data sample to be 6.60 cans per day. The manager wants a 99.5 percent service probability. Determine a new inventory plan based on this information and the data above. Part b: 4 points What is the standard deviation of the demand during the lead time? (Keep two decimals.)  Locally stored answer:  Part c: 4 points What is the z-score of the given service level?  Locally stored answer:  Part d: 4 points What is the safety stock?  Locally stored answer:  Part e: 4 points What is the reorder point?  Locally stored answer:  Question 7: Reorder Point 4 points A key difference between a fixed-order quantity inventory model, where demand is known and one where demand is uncertain, is in computing the reorder point. Please answer 'True' or 'False'.  Locally stored answer:  Question 8: Safety Stock 4 points Safety stock can be defined as the amount of inventory carried in addition to the expected demand. Please answer 'True' or 'False'.  Locally stored answer:  Question 9: P-Model 4 points Fixed-time period inventory models generate order quantities that may vary from time period to time period, depending on the usage rate. Please answer 'True' or 'False'.  Locally stored answer:  Question 10: P-Model 2 4 points In the fixed-time period model it is necessary to determine the inventory currently on hand to calculate the size of the order to place with a vendor. Please answer 'True' or 'False'.  Locally stored answer:  Question 11: Reorder Point 6 points Assuming no safety stock, what is the re-order point (ROP) given an average daily demand of 55 units, a lead time of 3 days and 854 units on hand?  Locally stored answer:  Question 12: Reorder Point 2 6 points A company wants to determine its reorder point (ROP). Demand is variable and they want to build a safety stock into ROP. If the average daily demand is 8, the lead time is 3 days, the desired z-value is 1.96, and the standard deviation of usage during a single day is 2.36, what is the desired value of ROP?  Locally stored answer:  Question 13: Standard Deviation of Demand over Exposure Period 6 points You would like to use the fixed-time period inventory model to compute the desired order quantity for a company. You know that vendor lead time is 8 days and the number of days between reviews is 8. What is the standard deviation of demand over the review and lead time, if the standard deviation of daily demand is 8?  Locally stored answer: 

The number of days (X) after mailout it takes a utility company to receive payment for a customer’s bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days.The probability is 0.997 that a bill will be received between which of the following number of days? (13, 49) (19, 43) (25, 37)