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.
Its bill is different in shape  to that of a duck, so even the term duck-billed platypus is a  misnomer. It has webbed feet, claws and a flat tail, and lives in  burrows in riverbanks.he platypus is uniquely adapted to live in a semi-aquatic environment. It has: Webbed feet with a retracting webbed membrane which c â¦ an expose the claws, enabling the platypus to effectively dig burrows.