Choose fit and data columns, Explore statistics, Setup plot – HP 39g+ User Manual
Page 95
Statistics aplet
8-3
Choose fit and
data columns
4. Select a fit in the Symbolic setup view.
>6+,)7@
SETUP
-
SYMB
*e,
8CPPT
Select
Linear
PF
You can define up to five explorations of two-variable
data, named
S1
to
S5
. In this example, we will create
just one:
S1
.
5. Specify the columns that hold the data you want to
analyze.
>6<0%@
You could have entered
your data into columns
other than C1 and C2.
Explore
statistics
6. Find the mean advertising time (
MEANX
) and the mean
sales (
MEANY
).
>180@
TU6UT
MEANX
is about 3.3
minutes and
MEANY
is
about $1796.
7. Scroll down to display the value for the correlation
coefficient (
CORR)
. The
CORR
value indicates how well
the linear model fits the data.
*e, 9 times
The value is 0.8995 to
four significant digits.
PF
Setup plot
8. Change the plotting range to ensure all the data points are
plotted (and select a different point mark, if you wish).
>6+,)7@
SETUP
-
PLOT
*A,
Ã
7
>(17(5@
>@ 100 >(17(5@
4000
>(17(5@