“ A N S ” K E Y S F O R 2 -V A R I A B L E S T AT I S T I C S

In addition to the 1-variable statistic keys, the following keys have been added for calcu- lating 2-variable statistics.

C alculates the sum of the product for sample data X and sample dataY. C alculates the sum of the data (sample dataY).

C alculates the sum of the data (sample dataY) raised to the second power. C alculates the average value of the data (sample dataY).

C alculates the standard deviation of a data population (sample dataY). C alculates the standard deviation for the data (sample dataY).

N OT E :

The codes for basic statistical quantities of sample data X and their meanings are the same as those for single-variable statistical calculations.

<Let’s check the results based on the previous data.>

7.175

(Average for data X )

0.973579551

(Standard deviation for data X )

0.91070028

(Standard deviation of the population for data X )

9.875

(Average for data Y)

3.440826313

(Standard deviation for dataY)

3.218598297

(Standard deviation of the population for data Y)

8

(Total count of data)

57.4

(Sum of data X )

418.48

(Data X raised to the second power)

544.1

(Sum of the product of data X and dataY)

79

(Sum of data Y)

863

(DataY raised to the second power)

28

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Sharp V/R manual S K E Y S F O R 2 -V a R I a B L E S T AT I S T I C S