00:01
We're looking at a stem and leaf plot.
00:03
And for part a, we want to know how many pieces of data in this data set are greater than or equal...
00:10
Okay, so greater than or equal to 10, but less than or equal to 19.
00:19
So we want between 10 and 19.
00:23
So how do we read a stem and leaf plot? well, if we look at the stem that starts with 1 and we have the leaves coming off it, this, for example, means you have a data point of 12, 13, and then 2 14s.
00:41
So this is how you read it.
00:43
The stem is the first digit, and then you have the digits following.
00:50
So how many data points meet this criteria? what we have to do is look at this first stem, because the first piece is 12, the last piece is 19.
00:59
So we're just going to add up how many pieces of data in this first stem...