SOLUTION: A resort tracks the number of days each guest stays. They've discovered that this variable is normally distributed with a mean of 9 days and a standard deviation of 3. They would

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Question 433172: A resort tracks the number of days each guest stays. They've discovered that this variable is normally distributed with a mean of 9 days and a standard deviation of 3. They would expect 10% of the guests stay longer than how many days?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

*Note: z+=+blue%28x+-+mu%29%2Fblue%28sigma%29

10% of the guests would stay longer than how many days? 

 z = 1.2816 for the 90%

mean of 9 days and a standard deviation of 3.

 9 + 3*1.2816 = 12.8448  or 13 days