Statistical Calculations - Casio fx-570AR X User Manual

• The closer the (Left Side) − (Right Side) result is to zero, the higher the
accuracy of the solution.
Important
• SOLVE performs convergence a preset number of times. If it cannot find
a solution, it displays a confirmation screen that shows "Continue:[=]",
asking if you want to continue. Press  to continue or  to cancel the
SOLVE operation.
• Depending on what you input for the initial value for x (solution variable),
SOLVE may not be able to obtain solutions. If this happens, try changing
the initial value so they are closer to the solution.
• SOLVE may not be able to determine the correct solution, even when one
exists.
• SOLVE uses Newton's method, so even if there are multiple solutions,
only one of them will be returned.
• Due to limitations in Newton's method, solutions tend to be difficult to
obtain for equations like the following:

Statistical Calculations

Perform the steps below to start a statistical calculation.
1. Press , select the Statistics Mode icon, and then press .
2. On the Select Type screen that appears, select a statistical calculation
type.
To select this type of statistical calculation:
Single-variable (x)
Paired-variable (x, y), linear regression
Paired-variable (x, y), quadratic regression
Paired-variable (x, y), logarithmic regression
Paired-variable (x, y), e exponential regression
Paired-variable (x, y), ab exponential regression
Paired-variable (x, y), power regression
Paired-variable (x, y), inverse regression
• Performing any of the above key operations displays the Statistics
Editor.
Note: When you want to change the calculation type after entering the
Statistics Mode, perform the key operation (Select Type) to display
the calculation type selection screen.
Inputting Data with Statistics Editor
Statistics Editor displays one, two, or three columns: single-variable (x),
single variable and frequency (x, Freq), paired-variable (x, y), paired-
variable and frequency (x, y, Freq). The number of data rows that can be
input depends on the number of columns: 160 rows for one column, 80
rows for two columns, 53 rows for three columns.
y = sin x, �� = ��
20
��
, �� = ��.
Press this key:
(1-Variable)
(y=a+bx)
(y=a+bx+cx
(y=a+b･ln(x))
(y=a･e^(bx))
(y=a･b^x)
(y=a･x^b)
(y=a+b/x)
2
)