To find the arithmetic mean of the numbers 2.15 and 2.85, you simply add the numbers together and divide by the number of terms. Here’s the calculation:

$\text{Arithmetic Mean} = \frac{2.15 + 2.85}{2}$

Let’s compute this.The arithmetic mean of the numbers 2.15 and 2.85 is 2.5.

Would you like to know more details or have any questions about this?

Here are some related questions you might find interesting:

1. How would the arithmetic mean change if another number were added?
2. How does the arithmetic mean compare to the median and mode in this case?
3. What is the geometric mean of these numbers?
4. Can the arithmetic mean be used to predict other statistical properties?
5. What is the standard deviation of these numbers?
6. How to calculate the weighted mean if different weights are given?
7. How does rounding affect the calculation of means?
8. How to visualize the distribution of these numbers on a number line?

Tip: When calculating means, ensure all numbers are measured on the same scale to maintain accuracy in interpretations.