Statistics Symbols Hub 8 Symbols
Statistics Symbols
Explore our complete math symbols list and interactive keyboard to lookup meanings, LaTeX codes, and UTF-8 characters for statistics symbols. Sample and population statistics including sample mean, standard deviation, hypothesis tests, p-values, and chi-square.
Statistics Symbols Table & Meanings
| Action | Symbol | Name | Meaning | Example | LaTeX | Unicode |
|---|---|---|---|---|---|---|
| x̄ | Sample Mean (X-Bar) | Arithmetic average of data points in a sample. | x̄ = (∑ x_i) / n | \bar{x} | U+0078 U+0304 | |
| s | Sample Standard Deviation | Standard deviation computed across sample observations with n−1 denominator. | s = \sqrt{\frac{\sum (x_i - \bar{x})^2}{n - 1}} | s | U+0073 | |
| s² | Sample Variance | Unbiased estimate of population variance from sample data. | s² = 16 ⟹ s = 4 | s^2 | U+0073 U+00B2 | |
| H₀ | Null Hypothesis | Default baseline assumption tested in statistical hypothesis testing (no effect/no difference). | H₀: μ = 50 | H_0 | U+0048 U+2080 | |
| H₁ | Alternative Hypothesis | The alternative claim accepted when the null hypothesis is rejected. | H₁: μ ≠ 50 | H_1 \text{ or } H_a | U+0048 U+2081 | |
| χ² | Chi-Square | Test statistic used for tests of independence and goodness of fit. | χ² = ∑ (O − E)² / E | \chi^2 | U+03C7 U+00B2 | |
| p | p-Value | Probability of obtaining results at least as extreme as observed data under H₀. | p < 0.05 \implies \text{reject } H_0 | p | U+0070 | |
| r | Pearson Correlation Coefficient | Linear correlation between two variables, ranging from −1 to +1. | r = 0.92 (strong positive correlation) | r | U+0072 |
Statistics Symbols FAQ
What is the difference between sample mean (x̄) and population mean (μ)?
x̄ (x-bar) represents the sample mean computed from a subset of observations. μ (Greek mu) represents the true, often unknown, population parameter mean.
What do H₀ and H₁ represent in hypothesis testing?
H₀ (H-naught) denotes the null hypothesis of no effect or no difference. H₁ or Hₐ denotes the alternative hypothesis that researchers seek evidence to support.