Assume that the probability of a being born with Genetic Condition B is $\displaystyle \pi=$11/12$\displaystyle$. A study looks at a random sample of 505 volunteers.

Find the most likely number of the 505 volunteers to have Genetic Condition B.
(Round answer to one decimal place.)
μ =

Let $\displaystyle {X}$ represent the number of volunteers (out of 505) who have Genetic Condition B. Find the standard deviation for the probability distribution of $\displaystyle {X}$.
(Round answer to two decimal places.)
σ =

Use the range rule of thumb to find the minimum usual value μ–2σ and the maximum usual value μ+2σ.
Enter answer as an interval using square-brackets only with whole numbers.
usual values =