Univariate Data Test Review

Front

What is the range of a set of data?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How do you determine which box and whisker plot shows more spread out data?

Back

The box and whisker plot with a longer interquartile range (IQR) indicates more spread out data.

Front

What does the lower quartile (Q1) represent in a box and whisker plot?

Back

Q1 is the median of the lower half of the data set, representing the 25th percentile.

Front

How do you calculate the range of a data set?

Back

Range = Maximum value - Minimum value.

Front

What does a right skewed histogram indicate about the data?

Back

A right skewed histogram indicates that most data points are concentrated on the left, with a tail extending to the right.

Front

What is a box and whisker plot used for?

Back

A box and whisker plot is used to display the distribution of a data set and identify its quartiles.

Front

What does the median represent in a data set?

Back

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

Front

What is the interquartile range (IQR)?

Back

The IQR is the difference between the upper quartile (Q3) and the lower quartile (Q1), representing the middle 50% of the data.

Front

How can you identify outliers in a data set?

Back

Outliers can be identified using the 1.5 * IQR rule: any data point that lies more than 1.5 times the IQR above Q3 or below Q1 is considered an outlier.

Front

What does a box plot show about the data?

Back

A box plot shows the median, quartiles, and potential outliers of a data set.