Answer:
1. 18
2. 2
3. 9
4. 28
5.
Step-by-step explanation:
1.
The number represented by any given leaf is the stem digit followed by the leaf digit;
In the case of the 1 | 8, 1 is the stem and the leaf is 8, hence the number represented is 18
2.
Considering what is explained above, the entry of 25 is represented by: 2 | 5
In the row of stem digit 2, there are two 5s, hence 2 entries of the number 25
3.
Once again, the above principle allows us to find the answer;
40 is represented by: 4 | 0
In stem and leaf diagrams the leaves each represent one number (or piece of data) and they are displayed in ascending order;
This means the ages which are greater than 40 will be the leaves above 4 | 0, which are:
4 | 1 3, 5 | 2 8 and 6 | 4 4 6 7 8
Meeting this condition, therefore, are 2 numbers with the stem 4, 2 numbers with the stem 5 and 5 numbers with the stem 6;
So, 2 + 2 + 5 = 9
4.
Each leaf is a number in the data set, and the data is the ages of attendees to the poetry reading;
The number of pieces of data, or the number of ages considered, will be the total number of leaves;
There are 4 with stem 0, 4 with stem 1, 7 with stem 2, 3 with stem 3, 3 with stem 4, 2 with stem 5 and 5 with stem 6;
So, the total is:
4 + 4 + 7 + 3 + 3 + 2 + 5 = 28
There are 28 pieces of data
5.
47 | 9
48 | 0 9
49 | 3
50 | 4 8
51 | 4 9
52 | 3 7
Key: 47 | 9 means 479 attendees in a month
