t-Test (Student’s t)

← Statistics

t-Test (Student’s t)

ST-01
ASPCSPAdvanced
Formula
t = (X̄ − μ) ÷ (s ÷ √N)
When to Use

Test whether a sample mean is significantly different from a population mean when population variance is unknown.

Symbol Legend
SymbolMeaningUnitNote
tt-statisticCompare to critical t-value from table
X̄Sample meansame as data
μPopulation meansame as data
sStandard deviation of samplesame as data
NSample size
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