Poisson Distribution CDF Calculator
Poisson Distribution CDF Calculator Poisson Distribution CDF Calculator $$ P(X \leq k) = e^{-\lambda} \sum_{i=0}^{k} \frac{\lambda^{i}}{i!} $$ Lambda (λ): Number of Events (k): Calculate CDF Reset
Read More
Poisson Distribution CDF Calculator Poisson Distribution CDF Calculator $$ P(X \leq k) = e^{-\lambda} \sum_{i=0}^{k} \frac{\lambda^{i}}{i!} $$ Lambda (λ): Number of Events (k): Calculate CDF Reset
Read MoreEnter the Pearson correlation coefficient (r) and sample size (n) to compute the t-statistic and two-tailed p-value, helping you assess the significance of the observed correlation. Note: This is an approximation; for critical analyses, use professional statistical software. Correlation p‑Value Calculator Correlation p‑Value Calculator Calculate the two‑tailed p‑value for a correlation coefficient using: $$ t=\frac{r\sqrt{n-2}}{\sqrt{1-r^2}}, […]
Read MoreUpper Incomplete Gamma Function Calculator Upper Incomplete Gamma Function Calculator Enter s (Shape Parameter): Enter x (Lower Limit of Integration): Calculate Reset
Read MoreComplementary Error Function (erfc) Calculator Complementary Error Function (erfc) Calculator The complementary error function is defined as $$ \operatorname{erfc}(x)=1-\operatorname{erf}(x). $$ * Enter the value of \( x \). Step 1: Enter \( x \) \( x \): e.g., 1 Calculate \( \operatorname{erfc}(x) \) Calculated Complementary Error Function \( \operatorname{erfc}(x) \): Recalculate Formula: \( \operatorname{erfc}(x)=1-\operatorname{erf}(x) \)
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 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 MoreHierarchical Regression F‑Value Calculator Hierarchical Regression F‑Value Calculator Calculate the incremental F‑statistic for hierarchical regression using: $$ F=\frac{(R^2_{\text{full}}-R^2_{\text{base}})/(k_{\text{full}}-k_{\text{base}})}{(1-R^2_{\text{full}})/(n-k_{\text{full}}-1)}. $$ * Enter the sample size \( n \), baseline model \( R^2 \) and number of predictors \( k_{\text{base}} \), and full model \( R^2 \) and number of predictors \( k_{\text{full}} \). Note: \( n […]
Read MoreUse this calculator to determine the confidence interval for the regression intercept in your analysis. Input your estimated intercept, standard error, sample size, and the number of predictors to obtain the confidence interval. For critical analyses, verify results with professional statistical software or consult a statistician. Regression Intercept Confidence Interval Calculator Calculate the confidence interval […]
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 MoreR‑Squared Confidence Interval Calculator For a regression model with sample size \( n \) and \( p \) predictors, the observed \( R^2 \) is converted to Cohen’s \( f^2=\frac{R^2}{1-R^2} \) with noncentrality parameter \(\lambda = f^2\,(n-p-1)\). The observed F‑statistic is $$ F_{\text{obs}} = \frac{(R^2/p)}{((1-R^2)/(n-p-1))}. $$ * Enter sample size \( n \), number of […]
Read More