AP Stats Semester Review

Front

What is the definition of standard deviation in statistics?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values. It indicates how much individual data points differ from the mean of the dataset.

Front

What does it mean if a distribution is approximately normal?

Back

A distribution is approximately normal if it follows a bell-shaped curve, where most of the data points cluster around the mean, and the probabilities for values further away from the mean taper off equally in both directions.

Front

What is the median in a dataset?

Back

The median is the middle value of a dataset when it is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you calculate the mean of a dataset?

Back

The mean is calculated by adding all the values in a dataset and then dividing by the number of values.

Front

What is a simple random sample?

Back

A simple random sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.

Front

What is the 75th percentile in a dataset?

Back

The 75th percentile is the value below which 75% of the data points fall. It is a measure of relative standing in a dataset.

Front

What is the difference between the mean and median?

Back

The mean is the average of all data points, while the median is the middle value when the data points are arranged in order. The mean can be affected by outliers, whereas the median is more robust.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (bins).

Front

What does it mean for a sample to be biased?

Back

A biased sample is one that does not accurately represent the population from which it is drawn, leading to skewed results.

Front

How do you find the fraction of a subset in a dataset?

Back

To find the fraction of a subset, divide the number of elements in the subset by the total number of elements in the dataset.