Twelve randomly-chosen students were asked how many times they had missed class during a certain semester, with this result: 2, 1, 5, 1, 1, 3, 4, 3, 1, 1, 5, 18.
For this sample, the median is _____.
A. 2.5
B. 3
C. 3.5
D. 2
need help please
1, 1, 1, 1, 1, 2, 3, 3, 4, 5, 5, 18
What is the middle number?
oh got it sorry I pasted the wrong question
When there is not middle number, as here, average the two closest to the middle.
http://en.wikipedia.org/wiki/Median
To find the median, we need to first arrange the data in ascending order: 1, 1, 1, 1, 2, 3, 3, 4, 5, 5, 18.
Now, we can find the middle value of the data set. Since we have 11 values, the middle value will be the 6th value. In this case, the 6th value is 3.
Therefore, the median for this sample is 3.
So the correct answer is B. 3.