Posted by Adam on .
The amount of a monthly phone bill is normally distributed with a mean of $60 and a standard deviation of $12. Fill in the blanks:
68% of her phone bills are between $______________ and $______________.

Statistics 
MathMate,
This problem is similar to your other question, or your friend's question at:
http://www.jiskha.com/display.cgi?id=1343087495 
Statistics 
Anonymous,
28 and 100