Cycle 7 Flashcard (2025): Box Plots, Two Way Tables & Scatter Plots

Front

What is a box plot?

Back

A box plot is a graphical representation of a dataset that displays the median, quartiles, and potential outliers. It shows the distribution of data based on a five-number summary: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

Front

What does the median represent in a box plot?

Back

The median is the middle value of a dataset when it is ordered from least to greatest. In a box plot, it is represented by the line inside the box.

Front

What are quartiles in a box plot?

Back

Quartiles are values that divide a dataset into four equal parts. The first quartile (Q1) is the median of the lower half, the second quartile (Q2) is the median, and the third quartile (Q3) is the median of the upper half.

Front

How do you interpret the lower quartile (Q1) in a box plot?

Back

The lower quartile (Q1) represents the 25th percentile of the data, meaning that 25% of the data points fall below this value.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables. Each point on the plot represents an observation in the dataset.

Front

What does a line of best fit represent in a scatter plot?

Back

A line of best fit is a straight line that best represents the data points in a scatter plot. It shows the general direction of the relationship between the two variables.

Front

What is the purpose of a two-way table?

Back

A two-way table is used to display the frequency distribution of two categorical variables. It helps in analyzing the relationship between the two variables.

Front

How do you calculate the percentage of a category in a two-way table?

Back

To calculate the percentage of a category, divide the frequency of that category by the total frequency and multiply by 100.

Front

What does a negative slope in a line of best fit indicate?

Back

A negative slope indicates an inverse relationship between the two variables, meaning that as one variable increases, the other variable decreases.

Front

What is the significance of outliers in a box plot?

Back

Outliers are data points that fall significantly outside the range of the rest of the data. They can indicate variability in the data or errors in data collection.