Noncentral 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 […]
Read MoreR² Calculator from Cohen’s \( f^2 \) Effect Size Given Cohen’s \( f^2 \) defined as $$ f^2=\frac{R^2}{1-R^2}, $$ the population \( R^2 \) is calculated as: $$ R^2=\frac{f^2}{1+f^2}. $$ * Enter Cohen’s \( f^2 \) (must be \( \ge 0 \)). Step 1: Enter Cohen’s \( f^2 \) Cohen’s \( f^2 \): e.g., 0.30 […]
Read MoreInverse Complementary Error Function (erfc⁻¹) Calculator Inverse Complementary Error Function Calculator Compute the inverse complementary error function, \( \operatorname{erfc}^{-1}(y) \), where $$ \operatorname{erfc}(x)=1-\operatorname{erf}(x). $$ * Enter a value \( y \) (with \(0 < y < 2\)). Step 1: Enter \( y \) \( y \) (erfc value): Enter a value between 0 and 2 […]
Read MoreCumulative Binomial Probability Calculator Cumulative Binomial Probability Calculator Use this calculator to determine the cumulative probability of obtaining up to a certain number of successes in a fixed number of trials. Input the number of trials, probability of success, and number of successes to compute the cumulative binomial probability. Number of Trials (( n )): […]
Read MoreInverse Error Function (erf⁻¹) Calculator Inverse Error Function (erf⁻¹) Calculator Value of y (-1 < y < 1): Calculate erf⁻¹(y) Reset
Read MoreBinomial Variance Calculator Binomial Variance Calculator Calculate the variance of a binomial distribution: $$ \text{Var}(X)=np(1-p). $$ * Enter the number of trials \( n \) and the probability of success \( p \) (0 ≤ \( p \) ≤ 1). Step 1: Enter Parameters Number of Trials, \( n \): e.g., 100 Probability of Success, […]
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