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Binomial mean / variance
μ = np; σ² = npq
Where: μ = mean, n = number of trials, p = probability of success
Solved example
Given: n = 7, p = 5
Find: mu (mean)
- Formula: μ = n·p
- Substitute the values: μ = 5·7
- Result: μ = 35
Answer: mu = 35
Calculator
How to calculate Binomial mean / variance
- Write down the formula: μ = np; σ² = npq.
- Note the known values (n, p).
- Substitute them and simplify to find mu.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Binomial mean / variance?
The formula is μ = np; σ² = npq, where μ = mean, n = number of trials, p = probability of success.
What is Binomial mean / variance when n = 7, p = 5?
mu = 35. Substitute the values into μ = np; σ² = npq and simplify.