Question

Suppose the times to cook meat on a grill are normally distributed with a mean of 23 minutes and a standard deviation of 1.9 minutes.

What is the difference in times between grilled meat that has a z-score of 2 and another meat that has a Z-score of -1?
• 2.85min
• 4.7min
• 5.7min
• 11.4min

Answer 1

5.7 min

Explanation:

Answer 2

That's a difference of three standard deviations or 3(1.9) = 5.7 minutes.

Answer: 5.7 min, third choice