Statistics Words
In short: Statistics vocabulary: 50 terms on mean, median, spread, distributions, sampling, correlation, and inference, each defined in plain words with a small data example for quick review from middle school to AP.
Data, mean, median, interquartile range, standard deviation, outlier, correlation, margin of error, sampling bias: this statistics vocabulary runs from middle school box plots to AP inference. Every entry is defined in a few lines and paired with a tiny data set, so you can see what the word measures and what it does not.
It helps when a problem asks you to “describe the shape and spread” and you need the right terms for your answer. Print the pages before a test, or keep them beside a worksheet that features a histogram or a scatterplot. Matching each word to a picture of data makes it far easier to recall later.
50 words on this page, each with a definition, a figure, a solved example and two quick questions.
Statistics Words: the full list
6th Grade
- Box Plot
- Dot Plot
- Frequency Table
- Histogram
- Interquartile Range (IQR)
- Mean Absolute Deviation (MAD)
- Mean, Median and Mode
- Outlier
- Quartiles
- Range (Statistics)
- Statistical Question
7th Grade
8th Grade
Algebra 1
Algebra 2
AP Statistics
- Categorical and Quantitative Variables
- Central Limit Theorem
- Chi-Square Test
- Coefficient of Determination (r²)
- Confidence Interval
- Confounding Variable
- Degrees of Freedom
- Experiment vs. Observational Study
- Five-Number Summary
- Hypothesis Testing
- Least-Squares Regression Line
- Null and Alternative Hypotheses
- P-Value
- Percentile
- Sampling Bias
- Sampling Distribution
- Significance Level (Alpha)
- Simple Random Sample
- Skewed Distribution
- Standard Error
- Stratified Random Sampling
- t-Distribution
- t-Test
- Type I and Type II Errors