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Math Help - lower and upper bounds of modal class

  1. #1
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    lower and upper bounds of modal class

    hi, i need to know what lower and upper bounds of modal class are and how to work it out
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  2. #2
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    Quote Originally Posted by andyboy179 View Post
    hi, i need to know what lower and upper bounds of modal class are and how to work it out
    hi

    upper bound is the highest possible value in that particular class and lower bound is the minimum possible value .

    Consider these classes :

    1-5 with frequency (20)
    6-10 (30)
    11-15 (40)

    so here the modal class is 11-15 and its upper bound , 15.5 and lower bound , 10.5
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  3. #3
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    Quote Originally Posted by mathaddict View Post
    hi

    upper bound is the highest possible value in that particular class and lower bound is the minimum possible value .

    Consider these classes :

    1-5 with frequency (20)
    6-10 (30)
    11-15 (40)

    so here the modal class is 11-15 and its upper bound , 15.5 and lower bound , 10.5
    im still kinda stuck! if the upper bound is the highest possible value wouldn't the answer be 40?
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  4. #4
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    Quote Originally Posted by andyboy179 View Post
    im still kinda stuck! if the upper bound is the highest possible value wouldn't the answer be 40?
    its 11-15 , 15.1 , 15.2 , 15.3 , 15.4 , 15.5 , 15.6 , 15.7 , 15.8 , 15.8 , 16

    There are 10 numbers (one decimal place) between 15 and 16 so to be fair , 15 will 'take' 5 and 16 will 'take' 5 .

    So you will see that the maximum 15 can take is till 15.5 , 15.6 onwards belong to 16 .

    40 is the frequency and it has nothing to do with bounds .
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  5. #5
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    oh i think i understand now, with my question it looks like this:

    3-5 6-8 9-11 12-14 15-17 18-22 23-27 28-40

    so the upper bounds would be 41 and the lower would be 3.5?
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  6. #6
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    [quote=andyboy179;508612]oh i think i understand now, with my question it looks like this:

    3-5 6-8 9-11 12-14 15-17 18-22 23-27 28-40
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  7. #7
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    also one more thing, can you tell me what modal class is? is it what 1 with the most frequency like mode?
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  8. #8
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    Quote Originally Posted by andyboy179 View Post
    also one more thing, can you tell me what modal class is? is it what 1 with the most frequency like mode?
    the class with the highest frequency .
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