Data & Statistics Review Questions

Front

What is the best measure of center to use when data contains outliers?

Back

Median is the best measure of center to use when data contains outliers.

Front

What is the best measure of variability to use when data contains outliers?

Back

Interquartile Range (IQR) is the best measure of variability to use when data contains outliers.

Front

What percentage of data falls between the first and third quartiles in a box and whisker plot?

Back

50% of the data falls between the first and third quartiles.

Front

How do you find the median of a data set?

Back

Arrange the data in order and find the middle number.

Front

What is the mode of a data set?

Back

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

Front

How do you calculate the interquartile range (IQR)?

Back

Subtract the first quartile (Q1) from the third quartile (Q3).

Front

What does a box and whisker plot represent?

Back

A box and whisker plot represents the distribution of a data set, showing the median, quartiles, and outliers.

Front

What is the definition of mean in statistics?

Back

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

Front

What is the definition of range in statistics?

Back

The range is the difference between the maximum and minimum values in a data set.

Front

What does it mean if a data set is skewed?

Back

A skewed data set has a tail on one side, indicating that the data is not symmetrically distributed.