How to Use the STEYX Function in Excel

This guide explains how to use STEYX Function in Excel, including its syntax, required arguments, practical examples, and common errors.

Description: The function returns the standard error of the predicted value of y for each value of x in the regression.

Syntax: STEYX (known_y's, known_x's)

Inside:

- known_y's: Array or range of dependent data points, is a required parameter.

- known_x's: An independent data point or range, which is a required parameter.

Attention:

- Arguments can be numbers, names or arrays that contain numbers.

- When typing logical values and presenting text numbers into function arguments -> these values are still counted, but cells with 0 value will still be counted.

- Function error occurs when arguments are text or error values cannot be converted.

- If known_y's and known_x's have a different number of data points -> the function returns the # N / A error value .

- If known_y's and known_x's are empty or have fewer than three data points -> the function returns the # DIV / 0 error value .

- The equation for standard errors is:

[sqrt {frac {1} {{left ({n - 2} right)}} left [{sum {{{left ({y - overline y} right)} ^ 2} - {{frac {{left [{ sum {left ({x - overline x} right) left ({y - overline y} right)}} right]}} {{sum {{{left ({x - overline x} right)} ^ 2}}} }} ^ 2}}} right]}]

Inside:

+ x is the sample mean AVERAGE (number1, number2. )

+ n is the sample size.

For example:

Calculate the standard error of the predicted value of y for each value of x in the regression of the values in the following data table:

- In the cell to calculate enter the formula : = STEYX (C6: C12, D6: D12)

- Press Enter -> the standard error of the predicted y value for each value of x in the regression is:

- If the number of data points of know_y's and know_x's are different -> the function returns the # N / A error value .

- If the number of data points of know_y's and know_x's is smaller than 3 data points -> the function returns the # DIV / 0 error value .

Above are instructions and some specific examples when using the STEYX function in Excel.

Good luck!