Brandon works at a small petting zoo with $8$ animals. He was looking at some data showing the masses of the animals. Each animal had a different mass between $2$ and $160\,\text{kg}$. The zoo then buys a horse that weighs $900\,\text{kg}$ as their $9^{\text{th}}$ animal. [[☃ explanation 1]]
**How does buying the horse affect the mean and median?**
[[☃ radio 1]]