﻿ STEYX function

# STEYX function

Returns the standard error of the predicted y-value for each x in the regression. The standard error is a measure of the amount of error in the prediction of y for an individual x.

Syntax

STEYX(known_y's,known_x's)

Known_y's     is an array or range of dependent data points.

Known_x's     is an array or range of independent data points.

Remarks

• Arguments can either be numbers or names, arrays, or references that contain numbers.

• Logical values and text representations of numbers that you type directly into the list of arguments are counted.

• If an array or reference argument contains text, logical values, or empty cells, those values are ignored; however, cells with the value zero are included.

• Arguments that are error values or text that cannot be translated into numbers cause errors.

• If known_y's and known_x's have a different number of data points, STEYX returns the #N/A error value.

• If known_y's and known_x's are empty or have less than three data points, STEYX returns the #DIV/0! error value.

• The equation for the standard error of the predicted y is:

where x and y are the sample means AVERAGE(known_x’s) and AVERAGE(known_y’s), and n is the sample size.

Example

The example may be easier to understand if you copy it to a blank worksheet.

How to copy an example

1. Create a blank workbook or worksheet.

2. Select the example in the Help topic.

Note   Do not select the row or column headers.

Selecting an example from Help

3. Press CTRL+C.

4. In the worksheet, select cell A1, and press CTRL+V.

5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

 1 2 3 4 5 6 7 8
 A B Known y Known x 2 6 3 5 9 11 1 7 8 5 7 4 5 4 Formula Description (Result) =STEYX(A2:A8,B2:B8) Standard error of the predicted y-value for each x in the regression (3.305719)

Applies To: Excel 2007

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