Standard Deviation, IQR, and Box Plots Review

Front

What is standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

What does a higher standard deviation indicate?

Back

It indicates that the data points are spread out over a wider range of values.

Front

What is the interquartile range (IQR)?

Back

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

Front

How do you calculate the IQR?

Back

IQR = Q3 - Q1.

Front

What does a box plot represent?

Back

A graphical representation of the distribution of a data set that shows the median, quartiles, and potential outliers.

Front

What is the median?

Back

The middle value of a data set when it is ordered from least to greatest.

Front

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

Back

Average the two middle numbers.

Front

What does it mean if the mean is less than the median?

Back

The data is likely skewed left.

Front

What does it mean if the mean is greater than the median?

Back

The data is likely skewed right.

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a data set into four equal parts.