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Relative Frequency

Relative Frequency. How to calculate relative frequency. Noemi Navas Arranz. 1. First of all, count the number of times that each piece of data is repeated. IIII. IIII. IIII. IIII. This is the absolute frequency. IIII. IIII. IIII. IIII. 2. Next, count the total number of events.

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Relative Frequency

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  1. Relative Frequency How to calculate relative frequency Noemi Navas Arranz

  2. 1. First of all, count the number of times that each piece of data is repeated.

  3. IIII IIII IIII IIII

  4. This is the absolute frequency. IIII IIII IIII IIII

  5. 2. Next, count the total number of events. II IIII IIII IIII IIII

  6. II IIII IIII IIII IIII

  7. 3. Now, write a fraction for each piece of data. Write the absolute frequency as the numerator and the total number of events as the denominator. II 15 25 Numerator IIII IIII IIII IIII Denominator

  8. The fraction is the relative frequency. II IIII IIII IIII IIII

  9. 4. Then, divide the numerator by the denominator. Use a calculator. II 15:25= IIII IIII IIII IIII

  10. Round the result up or down to the nearest hundredth. II 15:25=0,60 IIII IIII IIII IIII

  11. The result of the fraction is also the relative frequency. II IIII IIII IIII IIII

  12. 5. What happens if you add up all the relative frequencies? 0,60 + 0,28 + 0,12 = 1 Why is it 1? Because the sum of all the relative frequencies is the unit.

  13. 6. Look at these additions. Can you see any differences? 0,60 0,28 + 0,12 1,00 0.60 0.28 + 0.12 1.00 The only difference is the use of different symbols for the decimals: the comma and the point.

  14. Catalan and Spanish speaking countries use the comma for decimals.English speaking countries use the point. 0,60 0,28 + 0,12 1,00 0.60 0.28 + 0.12 1.00

  15. Let’s calculate the relative frequency!

  16. 1. First of all... II IIII IIII IIII IIII IIII IIII II III

  17. Count the number of times that each piece of data is repeated. This is the... II IIII IIII IIII IIII IIII IIII II III

  18. Absolute frequency II IIII IIII IIII IIII IIII IIII II III

  19. This is the absolute frequency II IIII IIII IIII IIII IIII IIII II III

  20. 2. Next... II IIII IIII IIII IIII IIII IIII II III

  21. Count the total number of events. II IIII IIII IIII IIII IIII IIII II III

  22. So, how many people answered the question? II IIII IIII IIII IIII IIII IIII II III 40

  23. 3. Now... II IIII IIII IIII IIII IIII IIII II III

  24. Write a fraction for each piece of data. How? II IIII IIII IIII IIII IIII IIII II III

  25. Write the absolute frequency as the numerator and the total number of events as the denominator. II 12 40 Numerator IIII IIII IIII IIII IIII IIII II Denominator III

  26. The fraction is ... II IIII IIII IIII IIII IIII IIII II III

  27. The fraction is the relative frequency. II IIII IIII IIII IIII IIII IIII II III

  28. 4. Then... II IIII IIII IIII IIII IIII IIII II III

  29. Divide the numerator by the denominator. Use ... a calculator. 12:40= II IIII IIII IIII IIII IIII IIII II III

  30. Round the result up or down to ... 12:40= II IIII IIII IIII IIII IIII IIII II III

  31. Round the result up or down to the nearest hundredth. 12:40=0,30 II IIII IIII IIII IIII IIII IIII II III

  32. The result of the fraction is ... II IIII IIII IIII IIII IIII IIII II III

  33. The result of the fraction is also the relative frequency. II IIII IIII IIII IIII IIII IIII II III

  34. 5. What happens if you add up all the relative frequencies? 0,30 + 0,18 + 0,20 + 0,08 + 0,25 = 1 Why is it 1? Because the sum of all the relative frequencies is the unit.

  35. 6. Work in groups.Order the steps of the process to calculate the relative frequency.When you finish write the numbers in your worksheet individually.

  36. 7. In groups, calculate the relative frequency for your own data.

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