Question 450041
A normal distribution has a mean of 10 and a standard deviation of 2.  Find the probability that a randomly selected x-value is in the interval between 8 and 12.
.
one std dev from 10 is
low value:10-2 = 8
high value: 10+2 = 12
So, if it is one standard deviation the probability is 68%
Note: I meant 68% not 98%!!