Statistics / Data Vocabulary

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the upper quartile (Q3) and the lower quartile (Q1) in a data set.

Front

What is a statistical question?

Back

A statistical question is one that anticipates variability in the data and expects a variety of answers.

Front

What does Q1 represent in a data set?

Back

Q1, or the lower quartile, represents the median of the lower half of the data.

Front

What does Q3 represent in a data set?

Back

Q3, or the upper quartile, represents the median of the upper half of the data.

Front

What is the median of a data set?

Back

The median is the middle value when the data is ordered from least to greatest.

Front

What is a box plot?

Back

A box plot is a graphical representation that summarizes a data set using five values: minimum, Q1, median (Q2), Q3, and maximum.

Front

What does it mean if data is skewed left?

Back

If data is skewed left, it means that the left tail of the distribution is longer or fatter than the right tail.

Front

What does it mean if data is skewed right?

Back

If data is skewed right, it means that the right tail of the distribution is longer or fatter than the left tail.

Front

What is a frequency table?

Back

A frequency table is a table that displays the number of times each value occurs in a data set.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, using bars to show the frequency of data within certain ranges.