# Geometric Distribution Calculator

## Calculate probabilities of the geometric distribution step by step

The calculator will find the simple and cumulative probabilities, as well as the mean, variance, and standard deviation of the geometric distribution.

Related calculator: Exponential Distribution Calculator

### Your Input

**Calculate the various values for the geometric distribution with $$$n = 7$$$ and $$$p = 0.5 = \frac{1}{2}$$$ (include a success trial).**

### Answer

**Mean: $$$\mu = \frac{1}{p} = \frac{1}{\frac{1}{2}} = 2$$$A.**

**Variance: $$$\sigma^{2} = \frac{1 - p}{p^{2}} = \frac{1 - \frac{1}{2}}{\left(\frac{1}{2}\right)^{2}} = 2$$$A.**

**Standard deviation: $$$\sigma = \sqrt{\frac{1 - p}{p^{2}}} = \sqrt{\frac{1 - \frac{1}{2}}{\left(\frac{1}{2}\right)^{2}}} = \sqrt{2}\approx 1.414213562373095$$$A.**

**$$$P{\left(X = 7 \right)} = 0.0078125$$$A**

**$$$P{\left(X \lt 7 \right)} = 0.984375$$$A**

**$$$P{\left(X \leq 7 \right)} = 0.9921875$$$A**

**$$$P{\left(X \gt 7 \right)} = 0.0078125$$$A**

**$$$P{\left(X \geq 7 \right)} = 0.015625$$$A**