Friday, April 15, 2011

Data Handling (Mean from Frequency Table)

How to calculate Mean from Frequency Table

A. The process
Refer to the following link for information on the process.

B. Notation 



B. Question:
Please post your answer to the following question. Show your working clearly.


source: http://www.mathsisfun.com

16 comments:

  1. (15×1+27×2+8×3+5×4)÷15+27+8+5=2.054.....≈2
    The mean is 2

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  2. The mean is 2 parking spaces, answer is rounded off

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  3. (15x1+27x2+8x3+5x4)/15+27+8+5=2.054545455.....
    The answer is rounded off to 2.

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  4. ((15×1)+(27×2)+(8×3)+(4×5)) ÷ (15+27+8+4) =
    (15+54+24+20) ÷ 54
    113 ÷ 54 ≈ 2

    The mean is 2

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  5. 15x1+27x2+8x3+5x3/15+27+8+4 = 2
    = is equal to the estimation sign(wavy equal sign)
    The mean is 2

    ReplyDelete
  6. (15x1)+(2x27)+(3x8)+(4x5)=113
    113 /(15+27+8+5)=2.0545454
    Round off to 2

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  7. ((1x15)+(2x27)+(3x8)+(4x5))÷(15+27+8+5) = 2.054 ≈ 2

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  8. When rounded off, the answer is 2.

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  9. 15x1+27x2+8x3+5x3/15+27+8+4 = 2.054...
    rounded off is 2

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  10. mean=total/frequency
    total=(1*15)+(2*27)+(3*8)+(4*5)
    = 15+54+24+20
    = 113
    frequency=15+27+8+5
    =55
    mean=113/55
    rounded off=2

    the mean is 2.

    ReplyDelete
  11. (15x1)+(27x2)+(8x3)+(4x5)/15+27+8+5 = 113/55 rounded of=2

    ReplyDelete
  12. Mean= (1x15)+(2x27)+(3x8)+(4x5) / 15+27+8+5 = 2.0545454.... rounded off = 2

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  13. (15x1+27x2+8x3+4x5)/ (15+7+8+5)=2.054545...rounded off to nearest whole number= 2

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  14. (15×1+27×2+8×3+5×4)÷15+27+8+5=2.05454545454...≈2
    the mean is about 2.

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  15. 113/55 is about 2.

    The mean is approximately 2.

    ReplyDelete