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?
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 ......