CALCULATING THE MEAN FROM A FREQUENCY TABLE

Work out the mean for each of these frequency tables, you may not use calculator.

Problem 1 :

Solution :

From the table, we understand that,

• at the age of 5 we have 2 people
• at the age of 6 we have 2 people
• at the age of 7 we have 5 people
• at the age of 8 we have 1 people

To find the total number of people, we will add 2, 2, 5 and 1.

Problem 2 :

Solution :

From the table, we understand that,

• 1 person is having no phone (0 phones)
• 3 persons is having 1phone.
• 2 persons is having 2 phones.
• No person is having 3 phones.
• 4 persons is having 4 phones.
• No person is having 5 phones.

Problem 3 :

Solution :

Problem 4 :

Solution :

Problem 5 :

Solution :