Texas Instruments TI-83 Guide Book

11-18 Lists
8311LIST.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 1:21 PM Printed: 02/19/01 1:37 PM
Page 18 of 18
sum( (summation) returns the sum of the elements in
list
.
start
and
end
are optional; they specify a range of
elements.
list
elements can be real or complex numbers.
prod( returns the product of all elements of
list
.
start
and
end
elements are optional; they specify a range of list
elements.
list
elements can be real or complex numbers.
sum(
list
[
,
start
,
end
]
) prod(
list
[
,
start
,
end
]
)
You can combine sum( or prod( with seq( to obtain:
upper upper
G
expression(x)
∏
expression(x)
x=lower x=lower
To evaluate
G
2
(N–1)
from N=1 to 4:
stdDev( returns the standard deviation of the elements in
list
.
The default value for
freqlist
is 1. Each
freqlist
element
counts the number of consecutive occurrences of the
corresponding element in
list
. Complex lists are not valid.
variance( returns the variance of the elements in
list
. The
default value for
freqlist
is 1. Each
freqlist
element counts
the number of consecutive occurrences of the corresponding
element in
list
. Complex lists are not valid.
stdDev(
list
[
,
freqlist
]
) variance(
list
[
,
freqlist
]
)
sum(, prod(
Sums and
Products of
Numeric
Sequences
stdDev(,
variance(

Texas Instruments TI-83 Specifications

General

Programming	TI-BASIC
Processor	Zilog Z80, 6 MHz
Weight	7.4 oz (210 g)
Display	96x64 pixels, monochrome LCD
Power Source	4 AAA batteries, 1 CR1616 or CR1620 for backup
Memory	32 KB RAM
Connectivity	2.5mm I/O port for linking with other TI calculators