Question 430607
Suppose the length of pregnancy for hamsters is normally distributed with a mean of 40 days and a standard deviation of 2 days. We can say that 90% of pregnant hamsters will give birth before X days . Find X (Round off to nearest whole number of days.)
-------------------------
Find the z-value with a 90% left-tail.
invNorm(0.90) = 1.2816
----
Find "x" using x = zs+u
---
X = 1.2816*2+40
X = 42.56 days
=====================
Cheers,
Stan H.