00:01
We have a cumulative frequency table.
00:03
We want to know how many months have 18 but less than 27 registrations.
00:08
So we're going to have the number of registrations.
00:11
We've been given the cumulative frequency.
00:13
The missing column that i'm going to fill in is the frequency column.
00:17
So we have 0 to 9, 9 to 18, 18 to 27, and this is one we are interested in, 27 to 36.
00:27
The cumulative frequencies are 2, 2, 6, 12.
00:31
So a cumulative frequency is kind of a running total.
00:36
So for example, the 6 here means that there were 6 registrations...
00:45
No, wrong way around.
00:47
There were fewer than 27 registrations on 6 of the 12 months.
00:54
Just trying to pass the context here.
00:57
So so this represents these three groups.
01:02
So the answer is not 6, because we just want this one frequency here...