Lead Time Is Exactly 20 Days Long

question 65

Multiple Choice

Lead time is exactly 20 days long. Daily demand is normally distributed with a mean of 10 gallons per day and a standard deviation of 2 gallons. What is the standard deviation of demand during lead time?

• A)20 times 2
• B)20 times 10
• C)2 times the square root of 20
• D)2 times the square root of 10
• E)400 times the square root of 10

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