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Thread: Sample

  1. #1
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    Sample

    The table shows the number of boys and the number of girls in each year group at Springfield Secondary School.
    There are 500 boys and 500 girls in the school.


    Year Group Number of boys Number of girls
    7 100 100
    8 150 50
    9 100 100
    10 50 150
    11 100 100
    Total 500 500


    Azez took a stratified sample of 50 girls, by year group.
    Work out the number of Year 8 girls in his sample.
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  2. #2
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    Re: Sample

    There were at total of 500 girls 50 of them, that is 50/500= 1/10 of them, year eight girls. 1/10 of the girls in his sample should be from year eight.
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