p-Value Calculator for Correlation Coefficients p-Value Calculator for Correlation Coefficients Correlation Coefficient (r): Sample Size (n): Calculate Reset Please fill out all fields correctly.
Read MoreUse this calculator to estimate the Beta (Type II Error Rate) in your hierarchical multiple regression analysis. By inputting the number of predictors, effect size, sample size, desired power, and alpha level, you can understand the likelihood of failing to reject the null hypothesis when it is false. For critical decisions, verify results with professional […]
Read MoreGamma Function Calculator Enter a number to calculate its Gamma function value. (The Gamma function generalizes the factorial.) Step 1: Enter Value Input Value (x): Calculate Gamma Gamma Function Result Γ(x): Recalculate
Read MoreBinomial CDF Calculator Calculate the cumulative probability for a binomial distribution: $$ P(X \le x)=\sum_{k=0}^{\lfloor x \rfloor} \binom{n}{k} p^k (1-p)^{n-k}. $$ * Enter the number of trials \( n \), probability of success \( p \) (between 0 and 1), and a value \( x \). Step 1: Enter Parameters Number of Trials, \( n […]
Read MoreEffect Size Calculator for Hierarchical Multiple Regression Effect Size Calculator for Hierarchical Multiple Regression R² for Full Model: R² for Reduced Model: Number of Predictors: Calculate Effect Size (Cohen’s f²) Reset
Read MoreNoncentral F-Distribution CDF Calculator Noncentral F-Distribution CDF Calculator Calculate the cumulative probability \( P(F \leq x) \) for the noncentral F-distribution. * Enter the F-value (\( x \)), numerator degrees of freedom (\( d_1 \)), denominator degrees of freedom (\( d_2 \)), and noncentrality parameter (\( \lambda \)). Step 1: Enter Parameters F-value, \( x […]
Read MorePost-hoc Statistical Power Calculator for Hierarchical Multiple Regression Post-hoc Statistical Power Calculator for Hierarchical Multiple Regression Total Sample Size (N): R² for Full Model: R² for Reduced Model: Significance Level (α): Calculate Power Reset
Read MoreCohen’s d Calculator for Student t-Test Cohen’s d Calculator for Student t-Test Calculate the standardized difference between two group means using: $$ s_p = \sqrt{\frac{(n_1-1)s_1^2+(n_2-1)s_2^2}{n_1+n_2-2}},\quad d=\frac{M_1-M_2}{s_p}. $$ * Enter the sample sizes, means, and standard deviations for both groups. Group 1 Parameters Sample Size, \( n_1 \): e.g., 30 Mean, \( M_1 \): e.g., 100 […]
Read MoreIndirect Effect Calculator for Mediation Models Indirect Effect Calculator for Mediation Models Calculate the indirect effect using the product-of-coefficients method: $$ \text{Indirect Effect} = a \times b $$ * Enter the path coefficient \( a \) (from the independent variable to the mediator) and \( b \) (from the mediator to the dependent variable). Step […]
Read MoreCohen’s f² Effect Size Calculator for Multiple Regression Cohen’s \( f^2 \) Effect Size Calculator In multiple regression, Cohen’s \( f^2 \) is calculated as: $$ f^2=\frac{R^2}{1-R^2}. $$ * Enter the \( R^2 \) value from your regression model (must be between 0 and 1). Step 1: Enter Regression \( R^2 \) Observed \( R^2 […]
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