To get the lower quartile and upper quartile do I get the median then find the median of the numbers above and below the median?
Yes.
To find the lower quartile and upper quartile, you can first start by finding the median of the entire dataset.
Once you have found the median, divide the dataset into two halves - one half containing all the values below the median, and the other half containing all the values above the median.
Next, find the median of the lower half of the dataset. This will be the lower quartile.
Finally, find the median of the upper half of the dataset. This will be the upper quartile.
In summary, to find the lower quartile and upper quartile:
1. Find the median of the dataset.
2. Divide the dataset into two halves - below and above the median.
3. Find the median of the lower half to get the lower quartile.
4. Find the median of the upper half to get the upper quartile.