Introduction of Statistical Data

In statistical data we need to Collect, organize and presenting a large amount of data by using bar charts, pictograph, line graph and dot plot.

Bar chart :

Bar charts are a type of graph that are used to display and compare the number, frequency or other measure (e.g. mean) for different discrete categories of data

This is the example of bar chart:

                                                                                 
Bar graph:


                               

Questions:                     

1. What is the title of this bar graph?                           
2. What is the range of values on the (vertical) scale?                         
3. How many categories are in the graph?                
4. Which food had the highest percentage of sugar?
5. Which food had the lowest percentage of sugar?            
6. What percentage of sugar is in soda?     
7. What is the difference in percentage of sugar between ice cream and crackers?                               

Answers:

1. 1   Amount of sugar of certain food.
2. 20 – 35
3. 37
4. Chocolate bar
5. Ketchup
6. 28.9 %
7. 21.4 – 11.8 = 9.6 

Dot Plot:

The student one social studies class were asked how many brothers and sister they have. The plot here shows the result.

                                   

Questions:

1. How many of the students have six siblings?
2. How many of student don’t have siblings?
3. How many of student have three or more siblings?

Answers:

1. How many of the students have six siblings?                   =    1
2. How many of student don’t have siblings?                         =    3
3. How many of student have three or more siblings?          =   11