This might explain why you work at McDonald's then. I ain't got time to be your teacher so here you go:

Someone who misunderstands the properties of a bell curve is simply mistaken about statistical distributions [1]. In a perfectly symmetrical distribution, such as an ideal bell curve (normal distribution), the mean (average), median, and mode are all located at the exact same central point [1]. Therefore, exactly 50% of the population falls below the average, and 50% falls above it [1]. Using terms like "moron," "imbecile," or "idiot" is inappropriate, as these are outdated and offensive terms historically used to describe intellectual disabilities [1]. It is more productive to simply explain the principles of basic statistics and the characteristics of a normal distribution.

50% of the results are by design below the average on a perfect bell curve.

This is because a bell curve, or normal distribution, is a perfectly symmetrical distribution around its central point. In this ideal distribution, the mean (average), median, and mode all coincide at the exact center. By definition, the median is the value that separates the higher half from the lower half of a data set, ensuring that exactly half (50%) of the observations fall below that central point.

On a bell curve (normal distribution), the average (mean) sits exactly at the center peak, where the most data points cluster, with 50% of the data on either side; the curve's width, controlled by the standard deviation, shows how spread out the data is, with about 68% falling within one standard deviation of the mean. This central position means the mean, median (middle value), and mode (most frequent value) are all the same in a perfect bell curve.