The following terms are briefly explained within this app.

 

[ Population ]
[ Data ]
[ Sample ]
[ Greek letter representing the representative value of the sample and population ]
[ Population mean ]
[ Mean x̄ = Σ(xi)/n ]
[ Sum of squares, SS=Σ(xi-x̄)² ]
[ Variance、SS/n ]
[ Unbiased variance, SS/(n-1)), s² ]
[ Standard deviation、SD ]
[ Standard error of the mean、SEM = √(SS/n/(n-1)) ]
[ Confidence interval、CI ]
[ Confidence limit、CL ]
[ Median ]
[ Quartiles ]
[ Box and Whisker plot ]
[ Skewness ]
[ Kurtosis ]
[ Statistic ]
[ Test statistic ]
[ Two-tailed test, One-tailed test ]
[ p-value, Null hypothesis, Alternative hypothesis ]
[ ignificance level, α ]
[ Degree of freedom ]
[ Continuity correction ]
[ Parametric and Nonparametric tests ]