Thread: Data Management HELP

The life span of a particular species of turtle are normally distributed with a mean of 180 years and a standard deviation of 40 years. What proportion of these turtles will live between 100 and 260 years?

Originally Posted by Kiran

The life span of a particular species of turtle are normally distributed with a mean of 180 years and a standard deviation of 40 years. What proportion of these turtles will live between 100 and 260 years?

Let X be the random variable life of the turtle (in years).

X ~ Normal(mean = 180, sd = 40)

Calculate Pr(100 < X < 260).

Note that this answer is the probability that X lies within 2 sd's of the mean ......