United-office LCD−8310 User Manual download pdf (Page 14)

Statistical Calculations

Note!

Use the

key to activate SD mode to complete statistical

calculations using standard deviation.

SD:

Standard Deviation (SD mode)

l Data input always starts with to clear statistical memory.

l Input data is used to calculate values for , ,

, , ,  which you can recall using the key

operations noted nearby.

Example 1.:

Calculate , , , , ,  for the following data:

55, 54, 51, 55, 53, 53, 54, 52

Memory Clear:

55 54 51 55

53 54 52

(Sample Standard Deviation )

(Population Standard Deviation )

(Arithmetic mean )

(No. of entries )

(Sum of values )

(Sum of the squares of the values )

Precautionary measures when entering data

l inputs the same data twice.

l You can also input multiple entries of the same data using .

To input the data 110 ten times, for example, press 110

l The above results can be obtained in any order, and not necessarily

that shown above.

l To delete data you have just input, press .

52.

SD.........

1.407885953

1.316956719

53.375

427.

22805.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 23 24

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United-office LCD−8310 User Manual Page 14