HP 39gII User Manual page 95

Explore statistics
Setup plot
Statistics 2Var app
You can create up to five explorations of two-variable
data, named S1 to S5. In this example, we will create
just one: S1.
5. Find the correlation, r, between advertising time and
sales.
M
The correlation is
r=0.8995...
6. Find the mean
advertising time ( )
and the mean sales
( ).
y
The mean advertising time,
minutes.
The mean sales,
7. Change the plotting range to ensure all the data
points are plotted (and select a different point mark, if
you wish).
S
SETUP-PLOT
\
- E
100
E
4000
x
, is approximately 3.3
x
, is approximately $1,796.
y
85