Download your PDF
Geometric Waiting-Time Mean Calculator result sheet — free, supported by sponsors. Your download button appears in 20 seconds.
This free download is supported by sponsors — continuing in
20
Your file is generated in your browser when you choose Download — nothing is uploaded. If this calculator returns enough numeric data, the export also includes its best-fit chart alongside the readable table.
WorldCalculate result export
Geometric Waiting-Time Mean Calculator — result sheet
Calculate the mean and variance of the number of trials until the first success in a geometric model.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: For trials counted through the first success: E(X)=1/p; Var(X)=(1−p)/p².
The result uses the convention that the successful trial is included in the count, a detail that changes geometric formulas.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Success probability p — %; minimum 1.0E-6; maximum 1
Worked example
| Input | Value |
|---|---|
| Success probability p | 0.25 |
Expected trials =4; variance =12.
Assumptions and limits
- Trials are independent and have the same success probability.
- The success probability is greater than zero.
- A finite stopping limit, changing probability, and failures-before-success convention are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
No saved result was found. Please run the calculation first, then choose Download again.