Box plots, dot plots and Histograms

Front

What is a box plot?

Back

A box plot is a standardized way of displaying the distribution of data based on a five-number summary: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

Front

What does a dot plot represent?

Back

A dot plot is a simple visual representation of data where each data point is represented by a dot above a number line, allowing for easy comparison of frequencies.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, where the data is divided into bins, and the height of each bar represents the frequency of data points in that bin.

Front

How do you find the median in a data set?

Back

To find the median, arrange the data points in ascending order and identify the middle value. If there is an even number of data points, the median is the average of the two middle values.

Front

What is the purpose of the interquartile range (IQR)?

Back

The interquartile range (IQR) measures the spread of the middle 50% of a data set, calculated as Q3 - Q1, and is used to identify outliers.

Front

How do you determine the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. A data set may have one mode, more than one mode, or no mode at all.

Front

What is the range of a data set?

Back

The range is the difference between the maximum and minimum values in a data set, providing a measure of how spread out the values are.

Front

What does a skewed distribution indicate?

Back

A skewed distribution indicates that the data is not symmetrically distributed, with a longer tail on one side. Positive skew has a tail on the right, while negative skew has a tail on the left.

Front

How can outliers affect the mean?

Back

Outliers can significantly affect the mean by pulling it in the direction of the outlier, making it less representative of the data set as a whole.

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often each value occurs in a data set, often represented in tables or graphs.