AP Stats: Semester 1 Exam Review

Front

What does it mean if a histogram is right skewed?

Back

A right skewed histogram has a longer tail on the right side, indicating that most data points are concentrated on the left with fewer high values.

Front

What is the formula for conditional probability P(A|B)?

Back

P(A|B) = P(A and B) / P(B), where P(A and B) is the probability of both events occurring.

Front

What does a correlation of 'no correlation' indicate?

Back

It indicates that there is no relationship between the two variables; changes in one variable do not predict changes in the other.

Front

How do you determine the number of values greater than a specific number in a data set?

Back

Count the number of data points that exceed the specified number.

Front

What is the effect of removing an outlier from a data set on the regression line?

Back

Removing an outlier can decrease the slope and increase the y-intercept of the regression line, depending on the outlier's position.

Front

Define 'outlier' in statistics.

Back

An outlier is a data point that differs significantly from other observations in a data set.

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data, showing the relationship between them.

Front

What does the term 'least squares regression line' (LSRL) refer to?

Back

The LSRL is a line that minimizes the sum of the squares of the vertical distances of the points from the line.

Front

What is the purpose of using a histogram in statistics?

Back

A histogram is used to represent the distribution of numerical data by showing the frequency of data points within specified ranges.

Front

Explain the concept of 'slope' in a linear regression model.

Back

The slope indicates the rate of change of the dependent variable for each unit change in the independent variable.