1/11 AP Stats Midterm Review

Front

What is confounding in experimental design?

Back

Confounding occurs when two or more variables are intertwined, making it difficult to determine the individual effect of each variable on the outcome.

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 does the 87th percentile mean in a normal distribution?

Back

The 87th percentile indicates that a value is higher than 87% of the data points in the distribution.

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by dividing the sum of all values by the number of values.

Front

What is a segmented bar chart?

Back

A segmented bar chart is a graphical representation that shows the proportion of different categories within a whole, using segments of a bar.

Front

How do you calculate a fraction from a data set?

Back

To calculate a fraction, divide the number of favorable outcomes by the total number of outcomes.

Front

What is the purpose of a survey in statistics?

Back

Surveys are used to collect data from a sample of individuals to make inferences about a larger population.

Front

What is the standard deviation?

Back

The standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

What does it mean for data to be normally distributed?

Back

Data is normally distributed when it follows a bell-shaped curve, where most values cluster around the mean.

Front

What is the significance of the mean in comparing groups?

Back

The mean provides a central value for a group, allowing for comparison between different groups or conditions.