AP Statistics Exam Review

Front

What is the interpretation of the slope of a regression line?

Back

The slope indicates the predicted change in the dependent variable for each one-unit increase in the independent variable.

Front

What does a slope of 0.61 in a regression model indicate?

Back

For every additional hour of growth, the logarithm of the culture's weight in grams is predicted to increase by 0.61.

Front

How do you calculate the inter-quartile range (IQR)?

Back

IQR = Q3 - Q1, where Q3 is the third quartile and Q1 is the first quartile.

Front

What is the purpose of the inter-quartile range?

Back

The IQR measures the spread of the middle 50% of data, indicating variability and helping to identify outliers.

Front

Define a regression line.

Back

A regression line is a line that best fits the data points in a scatter plot, representing the relationship between two variables.

Front

What is a dependent variable?

Back

A dependent variable is the outcome or response variable that is measured in an experiment.

Front

What is an independent variable?

Back

An independent variable is the variable that is manipulated or controlled in an experiment to test its effects on the dependent variable.

Front

What does it mean if a data set is skewed?

Back

A skewed data set has a distribution that is not symmetrical, with values concentrated on one side.

Front

What is the mean?

Back

The mean is the average of a data set, calculated by summing all values and dividing by the number of values.

Front

What is the median?

Back

The median is the middle value of a data set when the values are arranged in ascending order.