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# Standard deviation lesson

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### Standard deviation lesson

1. 1. Entry Activity – Calculate the mean from the frequency table below Height Frequency (cm)0 ≤ h < 10 510 ≤ h < 20 620 ≤ h < 30 1030 ≤ h < 40 2 ∑
2. 2. Entry Activity – Calculate the mean from the frequency table below Height Frequency Mid-point F x MP (cm)0 ≤ h < 10 5 5 2510 ≤ h < 20 6 15 9020 ≤ h < 30 10 25 25030 ≤ h < 40 2 35 70 ∑ 23 435 ∑ (Frequency x Mid-point) ÷ ∑frequency = 435 ÷23 = 18.913034 = 18.9 to 1 d.p.
3. 3. Today I will learn to calculate the standard deviation from a: set of data frequency table grouped frequency tableKey WordsMeanStandard deviationDifference
4. 4. The normal curve
5. 5. Formulas you need to knowCalculate the standard deviation for the data below: 6, 7, 8, 11, 13, 15
6. 6. Show me how you feel about what we have just done   
7. 7. Today I will learn to calculate the standard deviation from a: set of data frequency table grouped frequency tableKey WordsMeanStandard deviationDifference
8. 8. Formulas you need to knowCalculate the standard deviation for the data below: Shoe size 4 5 6 7 8 Frequency 3 6 9 3 1
9. 9. Show me how you feel about what we have just done   
10. 10. Today I will learn to calculate the standard deviation from a: set of data frequency table grouped frequency tableKey WordsMeanStandard deviationDifference
11. 11. Formulas you need to knowCalculate the standard deviation for the data below:Weight 0 ≤ w < 50 50 ≤ w < 100 100 ≤ w < 150 150 ≤ w < 200 200 ≤ w < 250Frequency 6 5 4 3 6
12. 12. Show me how you feel about what we have just done   
13. 13. Today I will learn to calculate the standard deviation from a: set of data frequency table grouped frequency tableKey WordsMeanStandard deviationDifference
14. 14. Work for today1) Calculate the standard deviation for the data below:10, 11, 14, 20, 35, 902) Calculate the standard deviation for the data in the tablebelow:Detentions 0 1 2 3Frequency 50 14 6 33) Calculate the standard deviation for the data in the tablebelow: Height 0 ≤ h < 500 500 ≤ h < 1000 ≤ h< 1500 ≤ h < (cm) 1000 1500 2000Frequency 6 5 8 4
15. 15. Show me how you feel about what we have just done   
16. 16. Today I will learn to calculate the standard deviation from a: set of data frequency table grouped frequency tableKey WordsMeanStandard deviationDifference