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the average life expectancy for US women is approximately normally distributed with a mean of 83.7...

the average life expectancy for US women is approximately normally distributed with a mean of 83.7 years old with a σn-1 = 3.1 years.

What is the z-score for a women how lived to the age of 92.7?

What percentage of US women lived more than 90 years old?

What percentage of US women live less than 85 years old?

What percentage of US women will live within + 2 years of the average?

What precent age of US women live between 70 and 75 years old?

Math   Statistics-And-Probability   
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