To find the median number of species spotted, we first need to list all the individual sightings in ascending order:
5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 10
Now, we can see that there are 20 sightings in total. Since there is an even number of sightings, the median will be the average of the two middle values.
The two middle values are the 10th and 11th values: 7 and 7.
To find the median, we add these two values together and divide by 2:
(7 + 7) / 2 = 14 / 2 = 7
Therefore, the median number of species spotted is 7.
Some birdwatchers each recorded the number of bird species that they spotted last weekend.
Work out the median number of species spotted.
Number of species Frequency
5 3
6 4
7 3
8 5
9 4
10 1
1 answer
1 answer