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Math Help - Maths....help

  1. #1
    Newbie
    Joined
    Jan 2008
    Posts
    3

    Maths....help

    on a frequency table about weight of crisps:
    frequency= 15,10,20,40,10
    weight in grams=14-16,16-18,18-20,20-22,22-24
    the mean is 19
    95% of the product contain at least how much crisps?
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  2. #2
    Junior Member
    Joined
    Dec 2007
    From
    University of California, Berkeley
    Posts
    48
    ok mmm id double check this but from the information you give me id think your best bet is to form a normal distribution
    you are told mean =19
    you can work out the sample variance and standard deviation from the info your told using the formula.
    this would be my first approach.
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