r 0 (n, r : integers) Formula: nCr Population
Standard Deviation n n i 1 n (xi x)2 n x2
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trigonometric functions, etc.)
COMPLEX: Complex number calculations
SD: Single-variable statistical calculations
(sample
standard deviation , etc.)
LR or REG: Paired-variable statistical calculations
(linear regression statistical calculations, etc.)
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Absence of display indicator indicates COMP Mode. Key Operation Mode Name*
Standard deviation calculations Normal calculations Calculations using grads Calculations using radians Number of
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l to enter the SD Mode for statistical calcula- tions using
standard deviation . If FIX or SCI is on the display, press
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} 55 } 53 } } 54 } 52 } Sample
standard deviation A q Population
standard deviation A p Arithmetic mean A `
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