Which metric is listed as a continuous metric example?

• A. Revenue per user
• B. Number of orders per day
• C. Click-through rate
• D. Email open rate

Answer: (A)

Continuous metrics are measurements that can take on an unlimited number of values within a range, not just whole numbers. Revenue per user fits this because money is measured with decimals and can be recorded to any precision (dollars, cents, fractions, etc.), so it can vary smoothly across a continuum of values.

The other options are not continuous in the common sense. The number of orders per day is a count, so it’s inherently discrete and must be a whole number. The click-through rate and the email open rate are proportions—rates expressed as a portion or percentage—often derived from counts, and while they’re represented with decimals, they’re fundamentally ratio-based measures rather than a direct continuous monetary value.