A scientist conducted research and plotted his results in the histogram shown below. Which of the following is the best measure of the center of the data? Median
Mode
Mean
They are all appropriate

Mean

Explanation:

The histogram in the given picture gives slightly bell shaped curve.

That means the data is symmetric and follows normal distribution.

Out of Mean, Median and mode , Mean is the best measure of the center of the data when data distribution is continuous and symmetrical.

We choose median if data has extreme values where as mode is considered as least measure of tendency and it used in nominal data.

Hence, the correct option is "Mean".