Variability and Data Displays

Front

What is variability in data?

Back

Variability refers to how spread out or how much the data points differ from each other in a data set.

Front

What is an interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set, representing the range of the middle 50% of the data.

Front

What is the mean?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

What is the median?

Back

The median is the middle value in a data set when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the mode?

Back

The mode is the value that appears most frequently in a data set.

Front

How do you find the median in an odd set of numbers?

Back

To find the median in an odd set of numbers, arrange the numbers in order and select the middle number.

Front

How do you find the median in an even set of numbers?

Back

To find the median in an even set of numbers, arrange the numbers in order and calculate the average of the two middle numbers.

Front

What does it mean if a data set has a high variability?

Back

A high variability means that the data points are spread out over a wide range of values, indicating less consistency.

Front

What does it mean if a data set has a low variability?

Back

A low variability means that the data points are close to each other and to the mean, indicating more consistency.

Front

What is a box plot?

Back

A box plot is a graphical representation of a data set that shows the minimum, first quartile, median, third quartile, and maximum.