Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 382

Function or
Instruction/Arguments
STATWIZARD OFF
STATWIZARD ON
stdDev(list[,freqlist])
Stop
!
Store: value variable
StoreGDB n
StorePic n
Equ(string,Y= var) Converts string into an equation and stores it in Y= var.
String 4
sub(string,begin,length)
sum(list[,start,end])
summation G (expression
[,start,end])
tan(value)
L1
tan (value)
Tangent(expression,
value)
tanh(value)
L1
tanh (value)
tcdf(lowerbound,
upperbound,df)
Result
Disables wizard syntax help for statistical
commands, distributions, and seq(.
Enables wizard syntax help for statistical commands,
distributions, and seq(.
Returns the standard deviation of the elements in list with
frequency freqlist.
Ends program execution; returns to home screen.
Stores value in variable.
Stores current graph in database GDBn.
Stores current picture in picture Picn.
Returns a string that is a subset of another string, from
begin to length.
Returns the sum of elements of list from start to end.
Displays the MathPrint™ summation entry template and
returns the sum of elements of list from start to end, where
.
start <= end
Returns the tangent of a real number, expression, or list.
Returns the arctangent of a real number, expression, or
list.
Draws a line tangent to expression at X=value.
Returns hyperbolic tangent of a real number, expression, or
list.
Returns the hyperbolic arctangent of a real number,
expression, or list.
Computes the Student-t distribution probability between
lowerbound and upperbound for the specified degrees of
freedom df.
Appendix A: Functions and Instructions
Key or
Keys/Menu or
Screen/Item
y N
STATWIZARD
OFF
y N
STATWIZARD ON(
y 9
MATH
7:stdDev(

†
CTL
F:Stop
¿
y <
STO
3:StoreGDB
y <
STO
1:StorePic
y N
String 4 Equ(
y N
sub(
y 9
MATH
5:sum(

NUM
0: summation G (
š
y A
y <
DRAW
5:Tangent(
y N
tanh(
y N
L1
tanh (
y =
DISTR
6:tcdf(
375