SOLUTION: If a bird's life is normally distributed with a mean of 9 months and a standard deviation of 3, what percent of the population lives less than 11 months.

Question 758878: If a bird's life is normally distributed with a mean of 9 months and a standard deviation of 3, what percent of the population lives less than 11 months.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If a bird's life is normally distributed with a mean of 9 months and a standard deviation of 3, what percent of the population lives less than 11 months.
-----
z(11) = (11-9)/3 = 2/3
---
P(x < 11) = P(z < 2/3) = 0.7475
===============
Cheers,
Stan H.
===============
RELATED QUESTIONS
Brand A car batteries have a warranty of 60 months. The warranty given by the company... (answered by scott8148)

The life spans of a computer manufacturer�s hard drives are normally distributed, with a... (answered by stanbon)

f the life, in months, of a certain type of car battery is normally distributed with a... (answered by stanbon)

9. The life span of a battery is normally distributed, with a mean of 2500 hours and a... (answered by ewatrrr)

01. The life span of a battery ins normally distributed with mean 30 months ans standard... (answered by Lightning_Fast)

The mean useful life of car batteries is 55 months. They have a standard deviation of 2.... (answered by Theo)

The mean useful life of car batteries is 57 months. They have a standard deviation of 6.... (answered by Boreal)

the life span of a battery is normally distributed, with a mean of 2100 hours and a... (answered by stanbon)

The shelf life of milk is normally distributed with a mean of 54 days and a standard... (answered by Boreal)