AP Statistics Review

Front

What is a random variable?

Back

A random variable is a variable whose possible values are numerical outcomes of a random phenomenon.

Front

What defines a continuous random variable?

Back

A random variable is continuous if the set of possible values includes an entire interval on the number line.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, often used for large data sets.

Front

What does it mean if a distribution is negatively skewed?

Back

A distribution is negatively skewed if the upper tail stretches out farther than the lower tail.

Front

What are disjoint or mutually exclusive events?

Back

Two events are disjoint or mutually exclusive when they have no outcomes in common.

Front

What is standard deviation in the context of a least squares line?

Back

The standard deviation about the least squares line is the typical amount by which an observation deviates from the least squares line.

Front

What is the purpose of a box plot?

Back

A box plot visually summarizes the distribution of a data set, showing the median, quartiles, and potential outliers.

Front

What is the central limit theorem?

Back

The central limit theorem states that the sampling distribution of the sample mean approaches a normal distribution as the sample size increases, regardless of the shape of the population distribution.

Front

What is a p-value in hypothesis testing?

Back

A p-value is the probability of obtaining test results at least as extreme as the observed results, assuming that the null hypothesis is true.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize and describe the characteristics of a data set, while inferential statistics use a random sample of data to make inferences about a larger population.