Practice six fair-dice mean and variance questions with numerical answer checks, explanations and session scoring.
How to use this tool
- Choose the event or model and review the assumptions below.
- Enter the labeled inputs.
- Select Check answer and read the labeled outputs.
- Change an input and calculate again; Reset restores the example inputs.
Calculation method
Means of summed dice add; a fixed modifier shifts the mean. Variance of one fair s-sided die is (s²−1)/12.
Assumptions and limits
A six-question educational practice bank with explanations, a next-question button and session scoring. Standard fair dice numbered 1 through s. No arbitrary user questions or exam certification.
Worked example
Select the mean of 1d6 and enter 3.5, then choose Check answer. Next question advances the exercise; Reset clears the session score. Enter decimals rather than fraction expressions.
Worked reading and practical questions
Browse Statistics calculators or explore other tools on the GreenCalc homepage.
Frequently asked questions
What does this calculator assume?
A six-question educational practice bank with explanations, a next-question button and session scoring. Standard fair dice numbered 1 through s. No arbitrary user questions or exam certification.
How do I enter and update the inputs?
Use the labeled fields, then select Check answer. Percent fields use 0 to 100. After editing, calculate again; Reset restores the example inputs.