Texas Instruments TITANIUM TI-89 - Manual (Page 882)

882 Appendix A: Functions and Instructions
stdDev() MATH/Statistics menu
stdDev( list [ , freqlist ])
⇒ ⇒ ⇒ ⇒ expression
Returns the standard deviation of the elements in
list .
Each freqlist element counts the number of
consecutive occurrences of the corresponding
element in
list .
Note: list must have at least two elements.
stdDev({a,b,c}) ¸
stdDev({1,2,5,л 6,3,л 2})
¸
stdDev({1.3,2.5,L6.4},{3,2,5})
¸ 4.33345
stdDev( matrix1 [, freqmatrix] )
⇒ matrix
Returns a row vector of the standard deviations
of the columns in
matrix1 .
Each freqmatrix element counts the number of
consecutive occurrences of the corresponding
element in
matrix1 .
Note: matrix1 must have at least two rows.
stdDev([1,2,5;-3,0,1;.5,.7,3]) ¸
[2.179 ... 1.014 ... 2]
stdDev([L1.2,5.3;2.5,7.3;6,L4],[4,2;3
,3;1,7]) ¸
[2.7005,5.44695]
stdDevPop() MATH/Statistics menu
stdDevPop( list [ , freqlist ]) ⇒ ⇒ ⇒ ⇒ expression
Returns the population standard deviation of the
elements in
list .
Each freqlist element counts the number of
consecutive occurrences of the corresponding
element in
list .
Note: list must have at least two elements.
In Radian angle and auto modes:
stdDevPop({a,b,c}) ¸
stdDevPop({1,2,5,л 6,3,л 2}) ¸
stdDevPop({1.3,2.5,L6.4},{3,2,5})
¸
stdDevPop( matrix1 [, freqmatrix] )
⇒ matrix
Returns a row vector of the population standard
deviations of the columns in
matrix1 .
Each freqmatrix element counts the number of
consecutive occurrences of the corresponding
element in
matrix1 .
Note: matrix1 must have at least two rows.
stdDevPop([[1,2,5][-3,0,1][.5,.7,3]])
¸
stdDevPop([L1.2,5.3;2.5,7.3;6,L4],[4,
2;3,3;1,7]) ¸