Glossary

Sign Test

Sign Test:

The sign test is a nonparametric test used with paired replicates to test for the difference between the 1st and the 2nd measurement in a group of “subjects”. For each pair, you assign a “1” if the 1st measurement has the larger value, a “0” if the 2nd measurement has the larger value. The test statistic is the sum of these values, and the question of interest is the frequency with which a random assignment of “1” and “0” within each pair yields as extreme a value (whether high or low) as the observed data.

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Planning on taking an introductory statistics course, but not sure if you need to start at the beginning? Review the course description for each of our introductory statistics courses and estimate which best matches your level, then take the self test for that course. If you get all or almost all the questions correct, move on and take the next test.