United Office LCD−8310 User Manual
Page 14
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
10
.
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
8.
427.
22805.