00:01
In this problem, we're taking data from a previous problem, and we are finding the sample median, which we are going to use that notation for.
00:14
We need to determine our sample mean, which will be defined by x bar, and we have to find our sample mode.
00:29
So if we go back to that previous problem, and we look at the stem and leaf plot that you already constructed, it would have had the numbers from 83 up to 100 for stems.
01:09
And our leaves were, for the 83 you had a leave of four.
01:18
For 84 you had two leaves of three.
01:22
For 85 we had a leave of three.
01:25
For 86 we had sevens, three of them.
01:30
For 87, it was four, five, six, six.
01:33
7, 8, 9.
01:38
For 88, our leaves were 2, 3, 3, 3, 3, 4, 5, 5, 6, 6, 7, 9.
01:55
For 89, your leaves were 0, 2, 3, 3, 6, 7, 8, 8, 6.
02:09
9 .9.
02:11
For 90, we had leaves of 0 -11 -3 -4 -4 -4 -4 -5 -6 -7 -8 -9.
02:32
For 91, we had leaves of 0 -0 -1 -1 -1 -1 -21, 2 -1 -2 -2, 2 -2, 5, 6, 6, 8, 8.
02:49
For 92, we had leaves of 2, 2, 2, 3, 6, 7, 7, 7.
03:00
For 93, you should have had leaves of 0, 2, 3, 4, 7, 7, 4, 7.
03:08
94 the leaves were two, two, four, and seven.
03:15
96, you had two leaves, one and five.
03:19
98, you had eight, and 100, we had a three.
03:30
And from there, we are now going to create our, or calculate our median, our mean, and our mode.
03:41
I'm going to start with mode, and the description of what a mode is, mode is the number that occurs with the most frequency.
04:06
And a data set could have multi -modes.
04:10
So in this problem, i see three sevens.
04:14
So therefore, 86 .7 is one of the modes.
04:20
I see three -threes right here.
04:23
So we have an additional mode at 88 .3.
04:30
There's three ones in a row right here, so 90 .1 is one of the modes.
04:38
There are three fours, so 90 .4 is a mode of this problem.
04:46
We have three zeros in a row, so therefore 91 .0 is a mode of this dataset.
04:54
We have three ones, so 91 .1 is a mode.
05:00
There are three twos, so 92 .2 is a mode, and there are three sevens.
05:09
So 92 .7 is a mode...