Sign test

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Why psychologists use the sign test

Flowchart showing when to use the sign test, how to remove ties, calculate N and S, and apply the critical value rule

Psychologists usually test a sample, not the whole population, so descriptive statistics alone cannot tell us whether a pattern is likely to be real or just chance. An inferential test helps decide whether the sample result is statistically significant, often using $p < 0.05$ as the cut-off.

Sign test

x

Why psychologists use the sign test

Flowchart showing when to use the sign test, how to remove ties, calculate N and S, and apply the critical value rule

Psychologists usually test a sample, not the whole population, so descriptive statistics alone cannot tell us whether a pattern is likely to be real or just chance. An inferential test helps decide whether the sample result is statistically significant, often using $p < 0.05$ as the cut-off.

Sign test Lesson

Sign test Lesson