# Pvar; Pvars - HP 48gII Advanced User's Reference Manual

Graphing calculator.

Input/Output:
GET, GETI, PUT

## PVAR

Type:
Command
Description: Population Variance Command: Calculates the population variance of the coordinate values in
each of the m columns in the current statistics matrix ( DAT).
The population variance (equal to the square of the population standard deviation) is returned as
a vector of m real numbers, or as a single real number if m = 1. The population variances are
computed using this formula:
where x
is the kth coordinate value in a column,
k
is the number of data points.
Access:
...µ
Input/Output:
MEAN, PCOV, PSDEV, SDEV, VAR

### PVARS

Type:
Command
Description: Port-Variables Command: Returns a list of the backup objects (:n
(:n
:n
port
library
The port number, n
If n
= 0, then memory is bytes of available main RAM; otherwise memory is bytes of available
port
RAM in the specified port.
...µ
Access:
L
/A
3
1
[[ matrix ]]
1
[[ matrix ]]
{ n
1
'
'
name
matrix
'name
'
{ n
matrix
[ vector ]
1
[ vector ]
{ n
1
'name
'
vector
'name
'
{ n
vector
{ list }
1
{ list }
{ n
1
'name
'
list
'name
'
{ n
list
L = Level; A = Argument; I = item
PVAR
Level 1/Argument 1
) in the specified port. Also returns the available memory size (RAM).
, must be in the range from 0 to 2.
port
PVARS
L
/A
L
/A
2
2
1
3
n
z
position1
put
m
}
z
row
col
1
put
n
z
position1
put
m
}
z
row
col
1
put
n
z
position1
put
}
z
position1
put
n
z
position1
put
}
z
position1
put
n
obj
position1
put
}
obj
position1
put
n
obj
position1
put
}
obj
position1
put
n
1
2
-- -
x
x
k
n
k
=
1
x
is the mean of the data in this column, and n
Full Command and Function Reference 3-133
L
/I
L
2
1
[[ matrix ]]
n
2
position2
[[ matrix ]]
{ n
2
row
'name
'
n
matrix
position2
'name
'
{ n
matrix
row
[ vector ]
n
2
position2
[ vector ]
{ n
2
position2
'name
'
n
vector
position2
'name
'
{ n
vector
position2
{ list }
n
2
position2
{ list }
{ n
2
position2
'name
'
n
list
position2
'name
'
{ n
list
position2
Level 1/Item 1
x
pvariance
, ... , x
[ x
]
pvariance1
pvariancem
:name) and the library objects
port
/I
1
2
m
}
col
2
m
}
col
2
}
}
}
}