Download Worksheet 2: Data Presentation: Frequency Distribution Table and more Exams Statistics in PDF only on Docsity!
Worksheet 2: Data Presentation: Frequency Distribution Table
Name: Date:
Frequency distribution table
- Data is classified into several classes, and then number of observation in each class is determined.
A) For qualitative data: class = category of the data
Example :
Frequency Distribution of Grade XI Science International MAN 4 Jakarta
Class or Category
Frequency
Male 19 Female 21
Exercise:
Make a frequency distribution table of your class member, based on:
- Gender Class or Category
Frequency
Male Female
- Favorite color Class or Category
Frequency
Blue Green Yellow Red Brown Other
- Type of their almamater ( junior high school) Class or Category
Frequency
SMP MTs Pesantren
B) For quantitative data
- Single data Example : Table 1. Frequency Distribution of Body Height of Grade XI Science International MAN 4 Jakarta Students
Height (cm) Frequency 148,00 1 150,00 1 152,00 2 159,00 2 160,00 1 161,00 1 162,00 2 164,00 2 165,00 2 167,00 3 168,00 6 169,00 1 170,00 4 172,00 4 173,00 1 174,00 2 175,00 2 177,00 1 180,00 2
- Grouped data o When number of data is large, grouped data is more preferred than single data, for its efficiency and simplicity. o Disadvantage: less accurate, since the “true” value of single data is unknown.
Data : Student’s body weight (kg):
41 60 72 72 65 64 48 90 60 75 53 48 63 49 58 39 39 75 55 62 53 59 58 38 72 62 60 59 68 60 70 60 56 80 65 85 71 45 70 55
Make the frequency distribution table of the above data!
Answer:
Step 1: Order the data, from the smallest to the largest: 38 39 … … … … … … … … … … … … … …
IV … …
V … …
VI … …
Step 6: Determine the mid-value of each class lower limit+upper limit Mid-value 2
Class Mid-value I 42 II 51 III … IV … V … VI …
Step 7: Count the frequency of each class, and then compile the table
Tabel 2 1 2 3 4 5 6 7 Class Class Boundary Class Limit Mid- Value Frequency Relative Frequency Percentage
I 38 – 46 37,5 – 46,5 42 5 0,125 12.5% II 47 – 55 46,5 – 55,5 51 7 0,175 17.5% III … … … … … … IV … … … … … … V … … … … … … VI … … … … … …
Note:
frequency n
relative frequency =
percentage = relative frequency ×100%
- Table that consist of column 1 through 5 = Frequency Distribution Table
- Table that consist of column 1 through 6 = Relative Frequency Distribution Table
- Table that consist of column 1 through 4, and 7 = Percentage Distribution Table
- Total relative frequency = 1
- Total percentage = 100%
Exercise :
Make a frequency distribution table, relative frequency distribution table, and percentage distribution table using data in Table 1!
