Sharp EL-120 User Manual download pdf (Page 27)

4.2. STANDARD DEVIATION

Press ON/C

0 . 0 0

T A B D E G S T A T

S t a t

appears on the screen.

Press

RCL (ﬁrst key, ﬁfth row) ¯x (ﬁrst key, seventh row)

2 8 . 5 0

T A B D E G S T A T

N =

appears on the screen.

The mean is 28,50.

4.2 Standard deviation

• Determine the standard deviation of the above data.

Without re-entering the data, press

ON/C RCL sx (second key, seventh row).

The standard deviation is 8,69.

4.3 Linear line

Please note: The calculator takes the a-value as the y-intercept and the b-value as the

slope.

• Determine the equation of a linear line

y = bx + a

Press

MODE 11

appears on the screen.

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Sharp EL-120 User Manual Page 27