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144 Appendix A: Tables and Reference Information
tcdf(lowerbound,
upperbound,df)
Computes the Student-t
distribution probability
between lowerbound and
upperbound for the
specified degrees of
freedom df.
y =
DISTR
5:tcdf(
Text(
row,column,text1,
text2,...,text n)
Writes text on graph
beginning at pixel
(row,column), where
0 row 57 and
0 column 94.
y <
DRAW
0:Text(
Then
See If:Then
Time
Sets sequence graphs to
plot with respect to time.
† y .
Time
timeCnv(
seconds) Converts seconds to units
of time that can be more
easily understood for
evaluation. The list is in
{days,hours,minutes,seconds}
format.
y N
timeCnv
TInterval
[listname,
freqlist,confidence level]
(Data list input)
Computes a t confidence
interval.
† …
TESTS
8:TInterval
TInterval
v,Sx,n
[
,confidence level]
(Summary stats input)
Computes a t confidence
interval.
† …
TESTS
8:TInterval
tpdf(
x,df) Computes the probability
density function (pdf) for
the Student-t distribution
at a specified x value with
specified degrees of
freedom df.
y =
DISTR
4:tpdf(
Trace
Displays the graph and
enters TRACE mode.
r
Function or Instruction/
Arguments
Result
Key or Keys/Menu
or Screen/Item