Beginner Stats Quiz

Which measure of central tendency is used to describe the value that occurs most frequently in a data set?

• Average

• Mode

• Mean

• Median

Approximately, what is the range of the distribution shown by this box-and-whisker plot?

• 570

• 250

• 175

• 650

Answer explanation

The range of the dataset is the maximum value minus the minimum value. In this case, it's: 620 - 50

Approximately, what is the 3rd quartile on this box-and-whisker plot?

• 200

• 250

• 350

• 620

Answer explanation

The third quartile on a box-and-whisker plot is the closing side on the right of the box

Approximately, what is the interquartile range for the data pictured in this box-and-whisker plot?

• 570

• 250

• 185

• 100

Answer explanation

The interquartile range is the 3rd quartile minus the 1st quartile, which is the spead of the middle half of the distribution.

How would you describe the skewness of the distribution exhibited by this box-and-whisker plot?

• Not Skewed

• Right Skewed

• Left Skewed

Answer explanation

Right skewed distributions have: mean > median.