According to research carried out by the Institute for Sodor Railroad Developmen

Question

According to research carried out by the Institute for Sodor Railroad Development, freight trains on Sodor Island carry 120 cargo cars. In actual fact, the number of cargo cars carried by a train is a normally distributed random variable with a mean of 110 and a standard deviation of 40. Use this information to answer the next FOUR questions. Note: The questions continue onto the next page. 20. What is the maximum number of cargo cars carried by the middle 70% of freight trains?

A. = NORM.INV(0.15, 120, 40) B. = NORM.INV(0.30, 120, 40) C. = NORM.INV(0.70, 110, 40) D. = NORM.INV(0.85, 110, 40)

Explanation / Answer

CORRECT ANSWER D. = NORM.INV(0.85, 110, 40)

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