2. Problem
• We want to know about the students shoe
size in IX D.
Identification Process
• We collect the data by observation (by asking
one by one)

3. Collected Data
NO Name Size NO Name Size
1 Adit 40 14 Kezia 41
2 Ahmad 42 15 Lisana 37
3 Altafiyani 41 16 Madiha 39
4 Annisa 40 17 M. Farhan 42
5 Dina 37 18 Mutiara 40
6 Emilia 40 19 Nurcholish 42
7 Ghaisani 37 20 Nurhaliza 37
8 Gina 39 21 Nurmaulida 38
9 Hani 37 22 Nynsca 39
10 Hilya 42 23 Sofie 40
11 Ikhram 43 24 Weby 37
12 Ilmi 37 25 Wini 40
13 Jody 42

4. Population
The population is all students in IX D
Sample
No sample, because the data is not too
numerous and we collect data by observe all
students in IX D (as population)

5. Sorting Data
The data is still random, so we have to arrange the data:
37 = 7 students
38 = 1 student
39 = 3 students
40 = 6 students
41 = 2 students
42 = 5 students
43 = 1 student
Highest value = 43
Lowest value = 37

6. Mean
Shoe Size 37 38 39 40 41 42 43
Frequency 7 1 3 6 2 5 1
Mean =
=
=
=
= 39.56

7. Mode
Shoe Size 37 38 39 40 41 42 43
Frequency 7 1 3 6 2 5 1
The highest frequency = 7 (which are the shoe size is 37)
Mode = the data which have high frequency
= 37

8. Median
Shoe Size Frequency The ... data n = number of data = 25
37 7
1st,2nd,3rd,4th, The ... data =
5th,6th,7th
38 1 8th
=
39 3 9th,10th,11th
40 6 12th,13th,14th,
15th,16th,17th = = 13th
41 2 18th,19th
42 5 20th,21st,22nd The 13th data is 40.
,23rd,24th
So, median of the data is 40.
43 1 25th

9. Range
After sorting the data, we know that:
Highest value = 43
Lowest value = 37
So, the range is = Highest value – Lowest value
= 43 – 37
=6

10. Quartiles
Shoe Size 37 38 39 40 41 42 43
Frequency 7 1 3 6 2 5 1
The...data 1st,2nd, 8th 9th,10th 12th,13th, 18th,19th 20th,21st, 25th
3rd,4th, ,11th 14th,15th, 22nd,23rd,
5th,6th, 16th,17th 24th
7th
 Quartile 2 (Q2) = median of the data (the 13th data)
= 40
 Quartile 1 (Q1) = the middle of the lowest value and Q2
The ... data =
= = 7th
So, Q1 is the 7th data = 37

11. Quartiles
Shoe Size 37 38 39 40 41 42 43
Frequency 7 1 3 6 2 5 1
The...data 1st,2nd, 8th 9th,10th 12th,13th, 18th,19th 20th,21st, 25th
3rd,4th, ,11th 14th,15th, 22nd,23rd,
5th,6th, 16th,17th 24th
7th
 Quartile 3 (Q3) = the middle of Q2 and the highest value
The ... data =
=
= 7 from 13 (Q2) = 19th
So, Q3 is the 19th data = 41.

12. Chart

13. Bar Chart
Shoe Size in IXD
8
7
The number of students
6
5
4
3
2
1
0
37 38 39 40 41 42 43
Shoe Size

14. Line Chart
Student Shoe Size in IXD
8
7
6
5
4
3
2
1
0
37 38 39 40 41 42 43

15. Pie Chart
Student Shoe Size in IXD
37
4% 38
20%
39
28% 40
8%
41
42
4%
24% 43
12%

16. Pictogram Chart
• 37 :
• 38 :
• 39 :
• 40 :
• 41 :
• 42 :
• 43 :

17. Conclusion
In our opinion, the most appropriate diagram for
our data which is the data of the students shoe size in
9D is a bar chart. Because, in addition to a bar chart is
easy to read and made, it is also very suitable to
present data that include the amount. Compared with
other diagrams created difficult and less fit to present
data that include the amount.