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Finding Mean, Median, Upper
Extreme, Lower Extreme and
Standard Deviation
Using the Graphics Calculator
• To find the measures of central tendency
(mean, median and mode), along with the
standard deviation for any given set of
data, follow these steps...
• Enter your data into “List 1” (L1)
• To do this...
• Press STAT
• Highlight EDIT and press ENTER
• Enter the data by pressing enter after each
• Next...
Press STAT
Cursor over to CALC
Highlight 1-VAR STATS
Press ENTER (1-Var Stats appears on the home
• Press ENTER a second time (list of stats
appears on the home screen)
• Cursor down to view all stats
• Find the mean, median, upper extreme,
lower extreme & standard deviation using
your calculator, given the following sample
5, 6, 7, 8, 9, 6, 9, 8, 7, 5
Example Answers...
• Mean (x with line above it) = 7
• Median (Med.) = 7
• Lower Extreme (Min X) = 5
• Upper Extreme (Max X) = 9
• Standard Deviation (Sx) = 1.49