1-Sample Sign Test in Excel

When to Use the 1-Sample Sign Test

A 1-Sample Sign Test compares values to a median or reference value and determines if the values are greater than (+) or less than (-) the value. This test can be found in the Stat Templates drop-down:

1-sample-sign-test

Test Example

Imagine that you have eight experimental engines and you want to know if they will run for 30 minutes on a liter of gas. Enter the data and median into QI Macros 1-sample sign test (Statistical Tools-Nonparametric):

1 sample sign test template in Excel

The eight run times are in column A. The target median is 30 minutes (D1) and alpha is 0.05 (D5). The template calculates confidence limits (D7:D8) and compares them to the median.

Hypothesis Test Results: In this case, reject the null hypothesis because for alpha = 0.05, the upper limit is 29, not 30 and the p value (0.0078) is less than 0.05.


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