00:01
All right, in your question, you were given test scores for 30 students, and you're asked to create a box and whisker plot for this data.
00:10
A box plot, they call it.
00:12
All right, so i've already done, i've already taken care of ordering the values and listing them out, and i've already taken care of finding the five number summary.
00:23
I'm going to show how you find these numbers, but just for speed purposes here, i found them ahead of time.
00:29
Okay, so the way you find your five number summary, if you're not using technology, would be to first find the median.
00:37
The median is going to be the middle number when the data is in order from least to greatest.
00:42
Now, i made my first row of numbers have 15 numbers.
00:45
My second row has 15 numbers, so it's a little easier to count.
00:49
Since we have 30 total values, the median is going to be found with the two middle numbers, which i'll highlight in blue, 70 and 74.
00:58
Those two numbers are the two middle numbers.
01:03
And there's 14 values below them and 14 values above them.
01:09
What you do in a case like this where you have two middle numbers is you average them.
01:14
So 74 plus 70 divided by 2 is 72.
01:21
Once you find your median, that separates the data into two halves.
01:27
So we have the half that's in my top row and the half.
01:30
That's in the bottom row.
01:32
And then you find the middle number for the lower half, which will highlight in blue again...