19
17
16.5 is the median.
The median of {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20] is the 6th values which is 15.
The median is 20, as it is the middle number when they are all listed in order.
Mean: 17 Median: 19 Mode: 20
The median is 19.
17
The median is 19.
Median = 15
In the example provided, the quartiles are: 25% = 16.5 (the median of {15, 16, 17, 18}) 50% = 18.5 (the median of {15, 16, 17, 18, 19, 20, 21, 22}) 75% = 20.5 (the median of (19, 20, 21, 22})
You average the two numbers in the middle. For example, if you have the numbers 9, 13, 17, and 20, the median is the average of 13 and 17, which is 15.
To find the median, first arrange the numbers in order (which they already are). Since there are 10 numbers (an even set), the median is the average of the two middle numbers. The two middle numbers are 16 and 17, so the median is (16 + 17) / 2 = 16.5.