Lesson 31: data and statistics, Tvpe; sample – HP 48G User Manual
Page 91
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Lesson 31: Data and Statistics
Statistical data, for the HP 48 are represented by matrices. Sucli a
matrix
contains
a
row
for each
d a t a p o i n t
and
a
column
for each
v a r i a b l e
measured at that point.
vari
vai-2
vai-m
pomti
•fii
■ ■
' ^ ' I m
point
2
•î’21
^^^22
■ ■ ■^-2711.
pouit
n
■-t' ■;?, 2
■ ■ run
The
Statistics application uses the data stored in the
c u r r e n t
s ta tis tic a l
m a t r i x ,
stored in reserved
variable
I d D A T .
You change the current
statistical
matrix
each time
you work with a
different
set of data.
Example:
Find
the
mean
and
standard deviation
for
each
variable
in
the
following
set.
of
sample
data.
The
two variables
are
the consumer price index (CPI) and the producer price
index (PPI) for the United States over a. 5-yea.r period:
Year
CPI
PPI
1
9.1
9.2
2
5.8
4.6
3
6.5
6.1
4
7.6
7.8
5
11.5
19.3
S t e p 1 :
Select S:i. r
0 i<
from tlie STAT menu.
SIHGLE-VflRIflELE STATISTICS
CDL: 1
TVPE; Sample
_MEflN
DEV _VARIANCE
_TOTAL _MAKIMUM .MINIMUM
ENTER STATISTICAL DATA___________
Calculus, Statistics and Advanced Mathematics 7-7