10: Running Total and Statistics  129 
File name : English-M02-1-040308(Print).doc   Print data : 2004/3/9
Month
Phone 
Expense 
Month 
Phone 
Expense 
1. May
2. June
3. July 
$340 
$175 
$450 
4. August 
5.September
6. October 
$780 
$245 
$625 
 
Calculate the mean, median, and standard deviation of the monthly 
phone bills. Then display the smallest value in the list. 
 
Keys: Display:  Description: 
    Displays current SUM list 
and SUM menu keys. 
@c 
 
or 
  
 
Clears current list or 
ets a 
new one. 
340 
I
  
Stores May’s phone bill; 
shows total.
 
175 
I
  
Stores June; updates total.
450 
I 
780 
I 
245 
I 
625 
I
 
Stores phone bills for 
July-October and keeps a 
running total.
 
e
  
 
 Displays CALC menu.
 
 
 
 Calculates mean.
 
 
 
 Calculates median.
 
   Calculates standard