How to Calculate the Median. The median is the middle score of a distribution. Consider this set of numbers: 5, 7, 9, 9, 11. Since you have an odd number of scores, the median would be 9. Now, what happens when you have an even number of scores so there is no single middle score. Consider this set of numbers: 1, 2, 2, 4, 5, 7. Since there are an even number of scores, you need to take the average of the middle two scores.
The platypus (Ornithorhynchus anatinus) also known as the duck-billed platypus is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania.
Duck Bill. One of the most distinguishing feature of the platypus is its duck bill. This feature enable the platypus to hear and breathe while diving for prey. It is remarkably similar to a duckâs bill, hence the name, but it most likely evolved independently of the duck, despite this similarity.t is one of only two mammals to lay eggs (the other being the echidna), it is one of only two species of mammal capable of envenomating (the other being the shrew) and it has a beak. It is highly adapted in a number of other ways, too, and is truly a strange product of its environment.