AP Statistics Terms
AP Statistics covers four major themes: exploring data, sampling and experimentation, probability and simulation, and statistical inference. This page links to every probability and statistics term on Mathwords to help you review. The AP Statistics exam is in May — use this as your comprehensive study reference.
Key Concepts
Mean is the most common measure of average, found by adding all values in a data set and dividing by the number of va...
Mode is the value that appears most frequently in a data set. A data set can have one mode, more than one mode, or no...
Standard deviation is a number that tells you how spread out the values in a data set are from the mean. A small stan...
Variance is a number that tells you how spread out the values in a data set are from the mean. A high variance means ...
Normal distribution is a way of describing how data spreads out symmetrically around a central value, forming a bell-...
A z-score is the number of standard deviations a data point is away from the mean of a dataset. A positive z-score me...
Probability is a number between 0 and 1 that measures how likely an event is to occur. A probability of 0 means the e...
Conditional probability is the probability of an event occurring given that another event has already happened. It an...
A confidence interval is a range of values, calculated from sample data, that is likely to contain the true value of ...
The null hypothesis is the starting assumption in a hypothesis test that there is no real effect, no difference, or n...
A p-value is the probability of getting results at least as extreme as what you actually observed, assuming the null ...
A chi-square test is a statistical test that measures whether the differences between observed data and expected data...
Regression is a statistical method for finding the equation of a curve or line that best fits a set of data points, a...
Correlation is a statistical measure that describes how strongly two variables are related and in what direction. Whe...
A residual is the vertical distance between an observed data point and the value predicted by a regression equation. ...
All AP Statistics Terms Terms (72)
- Addition Rule
- Arithmetic Mean
- Average
- Bernoulli Trials
- Binomial
- Binomial Coefficients
- Binomial Coefficients in Pascal's Triangle
- Binomial Probability Formula
- Box and Whisker Plot
- Boxplot
- Chi (Χ χ)
- Combination
- Combination Formula
- Combinatorics
- Complement of an Event
- Conditional Probability
- Continued Sum
- Correlation
- Correlation Coefficient
- Deciles
- Disjoint Events
- Disjoint Sets
- Event
- Expected Value
- Experiment
- Factorial
- First Quartile
- Five Number Summary
- Gambling Odds
- Geometric Mean
- Harmonic Mean
- High Quartile
- Impossible Event
- Independent Events
- Interquartile Range
- Least-Squares Fit
- Least-Squares Regression Equation
- Linear Fit
- Linear Regression
- Mathematical Model
- Mean
- Median of a Set of Numbers
- Mode
- Multiplication Rule
- Negative Direction
- Negatively Associated Data
- Odds
- Odds Against
- Odds in Favor
- Outcome
- Outlier
- Paired Data
- Partition of a Set
- Percentile
- Permutation
- Permutation Formula
- Pi (Π π)
- Population
- Positive Direction
- Positively Associated Data
- Probability
- Quartiles
- Quintiles
- Regression
- Regression Equation
- Residual
- RMS
- Sample Space
- Scatterplot
- Stem-and-Leaf Plot
- Sure Event
- Weighted Average