Imagine some X-axis, which stands for a property of a monitor. Let's mark off point 0 on the axis and agree that only the best monitors have 0 in this property. Next, let's mark off a neighbourhood of the point 0: –Q, +Q. This segment will include the entire range of values of this property for existing monitors.
Next, let's draw the Y-axis perpendicular to the X-axis; it will stand for the number of monitors. Now, let's assume that the number of monitors is expressed through the normal distribution function, or Gaussian distribution. Next, let's get rid of the unnecessary details.