Casio AL-8 Інструкція з експлуатації - Сторінка 12

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8-6

Standard deviation

With the function mode selector at the "SD(o}" position, the calculator

automatically computes standard deviation (o), arithmetical mean (x),

number of data {«}, sum of square (Ex2) and sum (£x) by operation

of Entry (data) Q and each answer is retrieved by depression of the Q

key and appropriateCD,ED>

SB & C3

keys, symbolized for their function.

* Be sure to depress the GB key prior to starting a standard deviation

function.

* Depression of theQ.QS.Q, Q or Q is not restricted to order.

427.

* To enter a data as a negative figure, operate Data OB in sequence.

v To correct the data after depressing the Q key, depress the 0 key

successively and re-enter the data correctly.

EXAMPLE

OPERATION

READ-OUT

——

mu i

.. i i

To find Standard deviation and arithme¬

tical mean based on the data: 1.2, —0.9,

-1.5, 2.7, -0.6.

"SD(o)" "F"

8B1020O9O0

105BB2Q7B

(mistake)

10600

(To correct) Q

0600

Note: The calculator computes the standard deviation (a) based on

the formula:

If the S,D. is required on the formula

in the above example, operate as follows.