Here are a few facts reported as Snapshots in USA Today.

• The median hourly pay for salespeople in the building supply industry is $10.41.
• Sixty-nine percent of U.S. workers ages 16 and older work at least 40 hours per week.
• Seventy-five percent of all Associate Professors of Mathematics in the U.S. earn $91,823 or less.

Identify the variable x being measured, and any percentiles you can determine from this information.