Which of the following is the most commonly used measure of central tendency? 1) range 2) mean 3) mode 4) median

The answer is Mean: 

(took this from a different source) : The mean is the most common measure of central tendency used by researchers and people in all kinds of professions. It is the measure of central tendency that is also referred to as the average. A researcher can use the mean to describe the data distribution of variables measured as intervals or ratios.

Hope this helped!

:)

The answer is Mean. I hope this helps :)

B. 2 1/2 feet. multiply 2.5 inches by 12 to get thirty inches then divide by 12 to get 2.5 feet