Question

calculate the average (arithmetic mean) of the list of numbers shown in the table. (rounded to the nearest tenth)

Explanation:

Step1: Find the sum of the numbers

$$223.0 + 250.8+250.9 + 236.7+250.0$$
$$=(223.0+250.8)+(250.9 + 236.7)+250.0$$
$$=473.8+487.6 + 250.0$$
$$=961.4+250.0$$
$$=1211.4$$

Step2: Calculate the average

The number of values \(n = 5\). The formula for the arithmetic mean \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\). So \(\bar{x}=\frac{1211.4}{5}=242.28\approx242.3\)

Answer:

\(242.3\)