The manager of a local diner has calculated his average daily sales to be $4500
with a standard deviation of $750.
a. In what range can the manager expect his daily sales to be 68% of
the time?
b. In what range can the manager expect his daily sales to be 95% of
the time?
c.
d.
In what range can the manager expect his daily sales to be 99.7% of
the time?
What assumption did you make about daily sales when answering parts
a., b., and c.?