HP -225 Owner's Manual page 201

Standard deviation
equation for, 172
in equations, 82
in keyboard calculations, 63, 64
(sTAT], 17, 60, 62
STAT ERROR, 175
STAT menu, 60, 62-63
Statistical data
clearing, 62
correcting, 61
entering, 60-61
memory requriements, 145
Statistical functions
equations for, 172
in equations, 82-83, 85
in keyboard calculations, 60-69
Statistical registers, 28, 60
STO
in keyboard calculations, 20, 37-38
with coordinate conversion regis-
ters, 50
(+]), 39
xJ, 39
(+], 39
(=), 39
Storage arithmetic, 39
Storage registers. See Variables
Summation statisitcs, 68-69
Surface area of sphere, 44
W(s0Ar), 36-37
{sx}, 63
sx function
in equations, 82
in keyboard calculations, 63
{s¥}, 63
sy function
in equations, 82
in keyboard calculations, 63
Syntax of equations, 78
T
(TAN), 45
TAN function
in equations, 82
in keyboard calculations, 45
TANH function
in equations, 82
in keyboard calculations, 51
Temperature conversions, 53
Temperature limits, 147
Testing the calculator, 148-149
Theta function, 82
Thin lens equation, 104-105
Time value of money, 109-112,
134-138
{TMP}, 53
TOO BIG, 58, 175
Transformations for non-linear data,
122-124
Trapezoid, perimeter of, 79
Triangle calculations, 117-119
Trigonometric functions, 45
Trigonometric mode. See Angular
mode
Two-number functions, 21, 41
TYPE NEW E@N, 73, 175
Underflow
definition, 27
in (soLve), 170
Unit conversion functions
in equations, 83, 86
in keyboard calculations, 53
@(uniTs), 18
UNITS menu, 18-19
Index 193