data handling

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data handling

  1. 1. Learning OutcomesRead and interpret data from a pie chartSolve problems in daily situation.
  2. 2. Read and interpret data from a pie chart. Example 1 : Number of books read by four girls in a week. Pie Chart = 10% 100% Susan 40% 30% Ah Ling Aini Tan The total number of books read by four girls is 30. a) What is the number of books read by Ah Ling ? (maximum) Step 1 : 40 Interpret the data 40% = 100 Step 2 : 4 10 x 30 = 12 books b) What is the number of books read by Susan? (minimum) Step 1 : 30 10% = 100 Step 2 : 3 10 x 10 = 3 books c) Find the difference number of books between Ah Ling and Susan. (range) Step 1: 12 books – 3 books = 6 books d) Find the average books read by Ah Ling, Aini and Susan Ah Ling = 12 books Susan = 3 books Aini : Average : Step 1 : 30% = 30 12 + 3 + 9 100 3 Step 2 : = 24 ÷ 3 3 10 x 30 = 9 books = 8 books
  3. 3. Example 2 : Favourite games of 160 pupils. 20% 15% Tennis Netball 25% Hockey Footballa) How many pupils like football? (maximum) Step 1 : Step 2 : 40 % = X 160 =b) How many pupils like Netball ? (minimum) Step 1 : Step 2 : 15 % = X 160 =c) Find the difference number between pupils like Football and Netball. (range) Step 1 : Pupils + Football subtract by Netball like =d) Find the average of pupils of the four games? Football = ? Netball = ? Hockey : Tennis : Average : Step 1 : Step 1 : 25% = 25 15% = 15 ?+?+?+? 100 100 4 Step 2 : Step 2 : 1 3 = ? 4 x 160 = ? 20 x 160 = ?

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