📊 Statistics & Probability Calculators
Use these calculators to solve basic and advanced statistics and probability problems, including mean, median, mode, standard deviation, permutations, combinations, and Z-score. Great for students and professionals.
📌 1. Mean, Median, Mode Calculator
Formula:
Mean = (Sum of values) / (Number of values)
Median = Middle value (after sorting)
Mode = Most frequent value
📌 2. Standard Deviation Calculator
Formula:
SD = √[ Σ(x – μ)² / N ]
Where μ = mean, x = each value, N = number of values
📌 3. Z-Score Calculator
Formula:
Z = (X – μ) / σ
Where X = score, μ = mean, σ = standard deviation
📌 4. Permutation & Combination Calculator
Formulas:
Permutations (nPr) = n! / (n – r)!
Combinations (nCr) = n! / [r! × (n – r)!]
📌 5. Probability Calculator
Formula:
P(E) = Number of favorable outcomes / Total outcomes