When you put the earthworm farmers' salaries in numerical order to find the mean ($10,000, $18,000, $18,000, $19,000, $19,000, $19,000, $20,000, $20,000, $45,000), you discover that it is $19,000. That is more in line with what the majority of earthworm farmers in our example earn than the average or mean of $20,889.
The months November, December, January, Feburary, March and April are considered the months when the flu virus is most active. At this time you may experience symptoms like cold, chills, runny nose and congestion.
Yearly flu vaccination should begin soon after flu vaccine is available and, ideally, by October. However, getting vaccinated even later can be protective, as long as flu viruses are circulating. While seasonal influenza outbreaks can happen as early as October, influenza activity most often peaks in January or later.