Tukey’s HSD Test Calculator Tukey’s HSD Test Calculator Enter the number of groups, error degrees of freedom, MSE, sample size per group, and significance level. HSD is computed as: HSD = q₍crit₎ × √(MSE/n), where q₍crit₎ is the Studentized Range critical value. Step 1: Enter Parameters Number of Groups (k): e.g., 3 Error Degrees of […]
Read MoreUse this calculator to perform a one-sample z-test, comparing a sample mean to a known population mean when the population standard deviation is known. Enter the sample mean, population mean, population standard deviation, and sample size to get the z-statistic and approximate two-tailed p-value. This tool is for educational and preliminary analysis only. One Sample […]
Read MoreJoint Probability Calculator Calculate the joint probability of two independent events using: \[ P(A \cap B) = P(A) \times P(B) \] * Enter the probabilities as decimals (e.g., 0.3 for 30%). Step 1: Enter Event Probabilities Probability of Event A, \( P(A) \): Example: 0.3 for 30% Probability of Event B, \( P(B) \): Example: […]
Read MoreNoncentral t Distribution CDF Calculator Noncentral t Distribution CDF Calculator For the Noncentral t distribution with degrees of freedom \( \nu \) and noncentrality parameter \( \delta \), the cumulative distribution function is given by: $$ F(t; \nu, \delta) = \Phi(-\delta) + \sum_{j=0}^{\infty} \frac{e^{-\delta^2/2} (\delta^2/2)^j}{j!} I\left(\frac{t^2}{t^2+\nu}; \frac{1}{2}, \frac{\nu}{2}+j\right). $$ * Enter the t-value, degrees of […]
Read MoreProjectile Motion Calculator Projectile Motion Calculator Calculate time of flight, maximum height, and range for a projectile. Using the formulas: Time of Flight: \( T = \frac{2v_0\sin\theta}{g} \) Maximum Height: \( H = \frac{v_0^2\sin^2\theta}{2g} \) Range: \( R = \frac{v_0^2\sin(2\theta)}{g} \) * Enter initial speed (m/s), launch angle (°), and gravitational acceleration (m/s²). Step 1: […]
Read MoreCoefficient of Variation Calculator Coefficient of Variation Calculator Mean (µ): Standard Deviation (σ): Calculate Coefficient of Variation Reset Coefficient of Variation Calculator – Educational Guide Coefficient of Variation Calculator Welcome to our Coefficient of Variation Calculator! This tool is designed to help you assess the relative variability of your data sets by calculating the Coefficient […]
Read MoreThis tool helps you estimate the adjusted R-square (sometimes referred to as population R²) for your regression model. By accounting for the number of predictors and sample size, adjusted R-square provides a more accurate measure of model fit that doesn’t inflate with the addition of extra predictors. For critical analyses, verify results with professional statistical […]
Read MoreIndirect Mediation Effect Variance Calculator Indirect Mediation Effect Variance Calculator Enter the coefficients \(a\) and \(b\) along with their standard errors \(s_a\) and \(s_b\) to calculate the indirect effect, its variance, and standard error. * Note: Variance is computed as \(b^2 s_a^2 + a^2 s_b^2\) and Standard Error as \(\sqrt{b^2 s_a^2 + a^2 s_b^2}\). Step […]
Read MoreIndirect Mediation Effect Confidence Interval Calculator Enter the coefficients for path a and path b along with their standard errors and the significance level (α). The indirect effect is computed as IE = a × b, and the SE is approximated using the Sobel formula. Step 1: Enter Parameters Coefficient a (Path from X to […]
Read MoreDerivative Calculator Derivative Calculator Function: Differentiation Variable: xtyz Point (optional, leave blank for symbolic differentiation): Calculate Derivative
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