Q‑Test Calculator Q‑Test Calculator Enter the group means, sample sizes, and standard deviation to compute the Q‑test statistic. Formula: \( Q = \frac{\text{Mean}_1 – \text{Mean}_2}{\text{SD} \times \sqrt{\frac{1}{n_1} + \frac{1}{n_2}}} \) Step 1: Enter Parameters Mean 1: e.g., 75 Mean 2: e.g., 70 Sample Size 1 (n₁): e.g., 30 Sample Size 2 (n₂): e.g., 30 Standard […]
Read MoreHydrology Calculators | Free Online Water Resource Tools Hydrology Calculators Enhance your hydrology projects with our free online hydrology calculators. Calculate travel time, hydrographs, underdrain requirements, runoff volumes, friction losses, and more to optimize water resource management. Time of Concentration & Travel Time Travel Time / Time of Concentration Calculator Kirpich’s Time of Concentration Calculator […]
Read MoreANOVA F-Test Calculator ANOVA F-Test Calculator Calculate the ANOVA F statistic and one-tailed p-value: $$ F = \frac{SSB/dfB}{SSW/dfW}. $$ * Enter the between-group sum of squares (SSB) with its degrees of freedom (dfB) and the within-group sum of squares (SSW) with its degrees of freedom (dfW). Step 1: Enter ANOVA Parameters Between-group Sum of Squares […]
Read MoreANOVA F-Score Calculator Calculate the ANOVA F statistic: $$ F = \frac{SSB/dfB}{SSW/dfW}. $$ * Enter the Between-group Sum of Squares (SSB) and its degrees of freedom (dfB), as well as the Within-group Sum of Squares (SSW) and its degrees of freedom (dfW). Step 1: Enter ANOVA Parameters Between-group Sum of Squares (SSB): e.g., 30 Degrees […]
Read MoreT-Test Calculator T-Test Calculator Calculate the t statistic and two-tailed p-value for a hypothesis test using: $$ t = \frac{\bar{x}-\mu_0}{s/\sqrt{n}}. $$ * Enter the sample mean (\( \bar{x} \)), hypothesized mean (\( \mu_0 \)), sample standard deviation (\( s > 0 \)), and sample size (\( n \ge 2 \)). Degrees of freedom: \( n-1 […]
Read MoreT-Score Calculator T-Score Calculator Calculate the t-score and two-tailed p-value for a hypothesis test using: $$ t = \frac{\bar{x}-\mu_0}{s/\sqrt{n}}. $$ * Enter the sample mean \( \bar{x} \), hypothesized mean \( \mu_0 \), sample standard deviation \( s \) (with \( s>0 \)), and sample size \( n \). Step 1: Enter Parameters Sample Mean, […]
Read MorePoisson Distribution Variance Calculator Poisson Distribution Variance Calculator For a Poisson distribution with parameter \( \lambda \), the variance is given by: $$ \sigma^2 = \lambda. $$ * Enter a value for \( \lambda \) (λ > 0). Step 1: Enter Parameter \( \lambda \): e.g., 5 (λ must be > 0) Calculate Variance Calculated […]
Read MorePoisson Distribution Sample Generator Poisson Distribution Sample Generator Generate random samples from a Poisson distribution with rate parameter \(\lambda > 0\). Samples are generated using the inverse transform method (Knuth’s algorithm). * Enter the rate parameter \(\lambda\) and the desired number of samples. Step 1: Enter Parameters Rate Parameter, \(\lambda\): e.g., 3 Number of Samples: […]
Read MorePoisson Distribution Mean Calculator Poisson Distribution Mean Calculator For a Poisson distribution with rate parameter \(\lambda > 0\), the mean is given by: $$ \mu = \lambda. $$ * Enter the rate parameter \(\lambda\). Step 1: Enter Parameter Rate Parameter, \(\lambda\): e.g., 2 Calculate Mean Calculated Mean Mean of the Poisson Distribution: Recalculate In a […]
Read MorePoisson Distribution CDF Calculator Poisson Distribution CDF Calculator For a Poisson distribution with rate parameter \(\lambda > 0\), the cumulative distribution function is: $$ F(x;\lambda)= \sum_{i=0}^{x}\frac{\lambda^i\,e^{-\lambda}}{i!},\quad x=0,1,2,\dots $$ * Enter a nonnegative integer \(x\) and a rate \(\lambda\). Step 1: Enter Parameters \(x\) (nonnegative integer): e.g., 3 Rate Parameter, \(\lambda\): e.g., 2 Calculate CDF Calculated […]
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