The question is asking which measurement Omar should use to find the average height of students in his class.

Out of the provided options:

• A) The range: The range is the difference between the highest and lowest values, not an average.
• B) The mean: The mean is the mathematical average, calculated by adding up all the heights and dividing by the number of students. This is the correct answer.
• C) The median: The median is the middle value when all heights are arranged in order, but it doesn't represent the average.
• D) The mode: The mode is the most frequently occurring height, not an average.

So, the correct answer is B) The mean.

Would you like more details on calculating the mean or any other terms?

Here are some related questions for practice:

1. How is the mean different from the median?
2. In what situations might the median be more useful than the mean?
3. What is the mode, and when is it a helpful measure?
4. How do you calculate the range?
5. How do outliers affect the mean?

Tip: The mean gives a good overall estimate, but outliers (extremely high or low values) can greatly influence it!