cut offs Flashcards
What is the conventional threshold for statistical significance?
p < 0.05
What does p < 0.01 indicate in hypothesis testing?
A more stringent significance level, indicating stronger evidence.
What values of skewness and kurtosis are generally acceptable to indicate normality?
Between -2 and 2.
What is an acceptable p-value for the Shapiro-Wilk and Kolmogorov-Smirnov tests to indicate normality?
p > 0.05.
What is the cutoff for identifying outliers using z-scores?
z-scores > ±3.29.
For Levene’s test, what p-value indicates equal variances?
p > 0.05.
In regression analysis, what Variance Inflation Factor (VIF) cutoff suggests no serious multicollinearity?
VIF < 5 (some use VIF < 10).
What is an acceptable tolerance level in regression analysis?
tolerance > 0.2.
What are the effect size cutoffs for Cohen’s d?
Small: r = 0.1, Medium: r = 0.3, Large: r = 0.5.
For eta-squared (η²) in ANOVA, what values represent small, medium, and large effects?
Small: η² = 0.01, Medium: η² = 0.06, Large: η² = 0.14.
In regression analysis, what R-squared (R²) values are typically seen as small, medium, and large effects?
Small: R² = 0.02, Medium: R² = 0.13, Large: R² = 0.26.
What power level is recommended for adequate sensitivity in hypothesis testing?
Power = 0.8 (80%).
What is the cutoff for Mahalanobis distance when identifying multivariate outliers?
Based on chi-square distribution, varies with degrees of freedom (number of variables).
In factor analysis, what is the Kaiser Criterion cutoff for eigenvalues?
Eigenvalues > 1 indicate factors worth retaining.
What are the recommended Cronbach’s Alpha values for internal consistency?
Acceptable: α > 0.7, Good: α > 0.8, Excellent: α > 0.9.
