A quantity of interest could be the revenue generated by the e-commerce service on the last weekend, e.g., $20,000, and its values over the last four weekends could be $12,000, $15,000, $18,000, and $20,000.

A quantity could also be the time of the day for peak sales, e.g., 9:00–12:00, and this peak traffic may have varied over the last four days: 9:00–12:00, 9:00–12:00, 12:00–15:00, and 9:00–12:00.

While the time of day for peak traffic for the e-commerce service is a quantitative variable of type interval, the last hour’s number of sales is a ratio [1].

Reference

  1. A.N. Glaser. High-yield Biostatistics. High-yield series. Lippincott Williams & Wilkins, 2001.
  2. By Jolly Janner [Public domain]