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On average, indoor cats live to 15 years old with a standard deviation of 2.7 years....

On average, indoor cats live to 15 years old with a standard deviation of 2.7 years. Suppose that the distribution is normal. Let X = the age at death of a randomly selected indoor cat. Round answers to 4 decimal places where possible.

a. What is the distribution of X? X ~ N(,)

b. Find the probability that an indoor cat dies when it is between 10.2 and 11.7 years old.

c. The middle 30% of indoor cats' age of death lies between what two numbers?
     Low:  years
     High:  years

Math   Statistics-And-Probability   
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