AP Statistics 1st Semester Review

Front

What is the mean in a normal distribution?

Back

The mean is the average value of a dataset, representing the center of the distribution.

Front

What does standard deviation measure in a dataset?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.

Front

What is a residual plot?

Back

A residual plot is a graph that shows the residuals on the vertical axis and the independent variable on the horizontal axis, used to assess the fit of a regression model.

Front

What does it mean if a residual plot shows no pattern?

Back

It indicates that the linear model is a good fit for the data.

Front

What is the correlation coefficient (r)?

Back

The correlation coefficient (r) measures the strength and direction of a linear relationship between two variables.

Front

What does an r value of 0.60 indicate?

Back

It indicates a moderate positive correlation between the two variables.

Front

What is the formula for finding outliers in a dataset?

Back

Outliers are found using the formula: Q1 - 1.5IQR for lower boundary and Q3 + 1.5IQR for upper boundary.

Front

What does IQR stand for?

Back

IQR stands for Interquartile Range, which is the difference between the first quartile (Q1) and the third quartile (Q3).

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, ranging from 0 (impossible) to 1 (certain).

Front

How do you calculate the z-score?

Back

The z-score is calculated using the formula: z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.