WEBVTT
1
00:00:00.990 --> 00:00:03.370 A:middle L:90%
this question chooses a table of the number of countries
2
00:00:03.370 --> 00:00:07.410 A:middle L:90%
participating in several Olympic Games. It asks us first
3
00:00:07.490 --> 00:00:09.929 A:middle L:90%
to find that the mean now the mean we know
4
00:00:10.000 --> 00:00:12.080 A:middle L:90%
. It's just that some of the X values,
5
00:00:12.089 --> 00:00:14.330 A:middle L:90%
some of all over data divided by the total number
6
00:00:14.330 --> 00:00:17.399 A:middle L:90%
of data We know that we have 12 data points
7
00:00:17.640 --> 00:00:19.500 A:middle L:90%
and if we add all of these up and a
8
00:00:19.500 --> 00:00:24.149 A:middle L:90%
calculator will get 699 now, our mean is gonna
9
00:00:24.149 --> 00:00:31.500 A:middle L:90%
be 699 divided by 12 or 58.2 five. Next
10
00:00:31.500 --> 00:00:33.020 A:middle L:90%
, it wants us to know it wants to know
11
00:00:33.020 --> 00:00:36.250 A:middle L:90%
the median. Since we have 12 data points,
12
00:00:36.640 --> 00:00:38.509 A:middle L:90%
we know that the meeting is gonna be the average
13
00:00:38.509 --> 00:00:42.509 A:middle L:90%
of the sixth lowest and the seventh lowest, which
14
00:00:42.509 --> 00:00:44.950 A:middle L:90%
all right, his ex sixth and x seven.
15
00:00:46.939 --> 00:00:48.799 A:middle L:90%
When we find these, we can count, amount
16
00:00:48.799 --> 00:00:53.310 A:middle L:90%
and find that the sixth lowest is 57 the seventh
17
00:00:53.310 --> 00:00:58.509 A:middle L:90%
lowest is 64 adding those up and dividing by not
18
00:00:58.509 --> 00:01:00.179 A:middle L:90%
by 12. Excuse me? My goodness issued.
19
00:01:00.179 --> 00:01:03.060 A:middle L:90%
Only beat by two were divided by two. Because
20
00:01:03.060 --> 00:01:04.659 A:middle L:90%
we're finding the average of these two points, we
21
00:01:04.659 --> 00:01:07.359 A:middle L:90%
want to find what's right in the middle and in
22
00:01:07.359 --> 00:01:11.620 A:middle L:90%
the middle of 57 64 this 60.5. So that's
23
00:01:11.620 --> 00:01:14.549 A:middle L:90%
your medium. Finally, we want to know the
24
00:01:14.549 --> 00:01:17.959 A:middle L:90%
mode and we only have 12 data points here is
25
00:01:17.959 --> 00:01:19.560 A:middle L:90%
that we can just look and count the amount.
26
00:01:19.870 --> 00:01:23.150 A:middle L:90%
We'll see that the only data only value that repeats
27
00:01:23.540 --> 00:01:26.659 A:middle L:90%
shows several times in this data is 37 with a
28
00:01:26.659 --> 00:01:30.079 A:middle L:90%
count of three. And they're 3 30 sevens in
29
00:01:30.079 --> 00:01:33.430 A:middle L:90%
this data and one of everything else is so 37
30
00:01:33.439 --> 00:01:34.099 A:middle L:90%
is our mood. These were